How To Cite With Chicago Style | Notes Or Author-Date

If you write papers in history, literature, or the social sciences, sooner or later you will meet Chicago style. The name sounds simple, yet the details can feel tricky when deadlines are close and sources pile up. Once you understand the two main Chicago systems and how they handle books, articles, and websites, citations turn into a routine part of your writing instead of a last-minute scramble.

Chicago style offers two families of citations: notes-and-bibliography and author-date. Both rest on the same ideas about giving credit, but they present information in different ways. This article walks through when each system suits your assignment, how to format entries step by step, and how to keep your paper tidy and consistent from the first footnote to the last page of your reference list.

What Chicago Style Does And When It Applies

The Chicago Manual of Style grew out of book publishing and still shapes how many academic presses and journals handle writing. In college courses, instructors usually pick Chicago for history, art history, religion, music, and some branches of the social sciences. Technical fields often lean toward other styles, yet many interdisciplinary subjects still rely on Chicago because it handles complex sources with care.

Chicago style has two documentation systems. The notes-and-bibliography style places a raised number in the text that points to a footnote or endnote, plus a bibliography at the end. The author-date style places a short citation in parentheses inside the sentence and uses a reference list instead of a bibliography. Under the surface, both methods share the same building blocks: author, title, publication facts, and page range.

Instructors usually specify which Chicago system they want. Humanities courses often prefer notes-and-bibliography because it keeps the main text free of extra brackets and lets you add short commentary in notes. Fields that read sources for current findings, such as many sciences and social sciences, lean toward author-date because the year sits right inside the citation and stands out on the page.

Chicago Style Systems At A Glance

Before diving into format rules, it helps to see the two systems side by side. The table below compares core features you will meet in nearly every assignment that asks for Chicago style.

Aspect	Notes-And-Bibliography	Author-Date
Typical Fields	History, literature, arts, theology	Sciences, social sciences, some interdisciplinary work
In-Text Signal	Superscript numbers pointing to notes	Parenthetical citations with author and year
Full Details Location	Footnotes or endnotes plus a bibliography	Reference list at the end of the paper
First Citation Style	Full note with author, title, publication facts, pages	Full entry only in the reference list, brief in the text
Repeated Citations	Shortened notes with author and brief title	Same author-date format each time
Order At End	Bibliography in alphabetical order by author	Reference list in alphabetical order by author
Main Strength	Flexible notes that handle commentary and complex sources	Compact citations that fit research reports and data-heavy writing
Common Direction From Instructors	“Use Chicago notes-and-bibliography with footnotes.”	“Use Chicago author-date with in-text citations.”

Once you know which column applies to your class, you can follow a small set of patterns again and again. When an assignment sheet mentions Chicago style without extra detail, it is safe to ask which of these two systems the instructor expects.

How To Cite With Chicago Style For Notes And Bibliography

Students often ask how to cite with Chicago style when every page seems to carry a new source type. In the notes-and-bibliography system, the rhythm stays the same: the text carries a small number, the bottom of the page carries the matching footnote, and the final pages of the paper hold an alphabetical list of every source you cited.

Setting Up Footnotes In Your Document

Word processors make footnotes simple once you know where the features sit. In Microsoft Word, place the cursor after the part of the sentence that needs a citation, then use the Insert > Footnote command. Word inserts a superscript number in the text and opens a matching note area at the bottom of the page. Type the note there. Google Docs and many other tools offer a similar insert-footnote command under the Insert menu.

Follow these habits for tidy notes:

• Place the superscript number after the closing punctuation of the sentence, unless your instructor tells you otherwise.
• Use a new footnote number for each new citation in the text.
• Keep footnote text in the same font as your main text, but in a smaller size if your style guide or instructor requests that.

Writing Full And Shortened Notes

The first time you cite a source, Chicago notes-and-bibliography asks for a full note. The format changes slightly with each source type, yet the pattern stays steady: author, title, publication facts, and page number if you quote or paraphrase a specific passage.

Here is a model full note for a book:

1. Mary Beard, SPQR: A History of Ancient Rome
   (New York: Liveright, 2015), 112.

If you quote the same book again later, you use a shortened note. That version trims down the title and drops some publication details:

5. Beard, SPQR, 145.

This short form ties clearly back to the full version in both the earlier note and the bibliography. For articles, chapters, and other sources, the same pair of full and short notes appears. The Chicago Manual of Style Citation Quick Guide gives many more models for both forms and is worth bookmarking for regular use
(Chicago Manual of Style Citation Quick Guide).

Building The Bibliography

The bibliography gathers every source you cited in your notes and arranges them in alphabetical order by author’s last name. Entries use a hanging indent, with the first line flush left and the rest of the entry indented. Unlike footnotes, bibliography entries invert the author name and use periods instead of commas between major parts.

Here is the matching bibliography entry for the book above:

Beard, Mary. SPQR: A History of Ancient Rome.
New York: Liveright, 2015.

Notice the shifts from the note: the last name comes first, the parentheses disappear, and the pieces separate with periods. These small patterns repeat from source to source. A quick check with a recent university Chicago style quick guide, such as the one from the UC Davis Writing Center
(Chicago style quick guide), helps confirm that your layout matches current practice.

Using Chicago Style Citations In Author-Date Format

The author-date system keeps citations inside the sentence rather than at the bottom of the page. This style works well when readers care about the year of a study or the freshness of data, because the date appears right next to the author name. Each in-text citation points to a matching entry in the reference list at the end of the paper.

The basic in-text format has three pieces: author last name, publication year, and a page number when needed. You place them inside parentheses with a space between the name and year, and a comma before the page number.

In-Text Author-Date Citations

Here is a direct quotation in author-date style:

Rome grew by "adopting parts of other cultures" (Beard 2015, 45).

If you mention the author in the sentence, you move the year and page into the parentheses and leave the name in the sentence:

As Beard notes, Rome grew by "adopting parts of other cultures" (2015, 45).

When you summarize ideas rather than quoting a sentence, you still give a parenthetical citation. If your summary covers a general point from an entire work, you can omit the page number unless your instructor wants it.

For works with two authors, list both last names: (Smith and Jones 2020, 77). For three or more authors, Chicago author-date uses et al. after the first name: (Smith et al. 2020, 77).

Creating The Reference List

The reference list in author-date style looks close to the bibliography in the notes-and-bibliography system, but with one major change: the year moves right after the author name. This layout makes the date easy to scan, which fits the way research readers skim sources.

Here is a sample reference list entry for the same book used in the footnote example:

Beard, Mary. 2015. SPQR: A History of Ancient Rome.
New York: Liveright.

Articles, chapters, and digital sources follow the same flow: author, year, title, container (such as journal or website name), and access details. Pay close attention to punctuation and italics. The same order appears across the list, which helps readers trace each in-text citation back to its full entry without confusion.

Choosing A Chicago System For Your Assignment

Many students move between courses that ask for both Chicago systems during the same term. That can create mix-ups, such as placing a footnote inside an author-date paper or using a parenthetical citation in a notes-and-bibliography paper. A quick way to avoid that tangle is to treat each system as its own set of rules from the start of the project.

When you read the assignment sheet, underline the phrases that refer to citations. Phrases like “footnotes,” “endnotes,” and “bibliography” indicate notes-and-bibliography. Phrases such as “in-text citations” and “reference list” point toward author-date. If the instructions name Chicago but leave out these clues, sending a short message to the instructor early in the process saves trouble later.

One handy habit is to label your working document at the top with the system you use, such as “Chicago notes-and-bibliography” or “Chicago author-date.” That reminder keeps your formatting choices steady, especially when you come back to a draft after a long break.

Sample Chicago Style Citations For Common Sources

Once you know the patterns for notes and author-date, examples for common sources give you a template you can adjust. The table below sets out sample entries for both systems. Replace the names, titles, dates, and page numbers with details from your own sources, and you will have citations that line up with Chicago expectations.

Source Type	Notes-And-Bibliography	Author-Date
Book, One Author	Note: 1. Mary Beard, SPQR: A History of Ancient Rome (New York: Liveright, 2015), 112. Bibliography: Beard, Mary. SPQR: A History of Ancient Rome. New York: Liveright, 2015.	In text: (Beard 2015, 112) Reference list: Beard, Mary. 2015. SPQR: A History of Ancient Rome. New York: Liveright.
Chapter In Edited Book	Note: 2. John Smith, “Trade Routes,” in The Ancient Mediterranean, ed. Jane Doe (Boston: Academic Press, 2020), 55. Bibliography: Smith, John. “Trade Routes.” In The Ancient Mediterranean, edited by Jane Doe, 45–70. Boston: Academic Press, 2020.	In text: (Smith 2020, 55) Reference list: Smith, John. 2020. “Trade Routes.” In The Ancient Mediterranean, edited by Jane Doe, 45–70. Boston: Academic Press.
Journal Article	Note: 3. Alex Lee, “Urban Growth,” Journal of Historical Studies 10, no. 2 (2018): 210. Bibliography: Lee, Alex. “Urban Growth.” Journal of Historical Studies 10, no. 2 (2018): 200–220.	In text: (Lee 2018, 210) Reference list: Lee, Alex. 2018. “Urban Growth.” Journal of Historical Studies 10 (2): 200–220.
Website Page	Note: 4. University of Chicago Press, “Chicago Style Guidelines,” last modified March 3, 2023, accessed September 10, 2025. Bibliography: University of Chicago Press. “Chicago Style Guidelines.” Accessed September 10, 2025.	In text: (University of Chicago Press 2023) Reference list: University of Chicago Press. 2023. “Chicago Style Guidelines.” Accessed September 10, 2025.
Online News Article	Note: 5. Maria Perez, “New Archaeological Find,” New York Times, July 4, 2022, sec. A. Bibliography: Perez, Maria. “New Archaeological Find.” New York Times, July 4, 2022.	In text: (Perez 2022) Reference list: Perez, Maria. 2022. “New Archaeological Find.” New York Times, July 4, 2022.
Video Or Film	Note: 6. Documentary Title, directed by Jane Lee (Los Angeles: Studio Name, 2019). Bibliography: Documentary Title. Directed by Jane Lee. Los Angeles: Studio Name, 2019.	In text: (Documentary Title 2019) Reference list: Documentary Title. 2019. Directed by Jane Lee. Los Angeles: Studio Name.
Report Or PDF	Note: 7. World Health Organization, Sample Health Report (Geneva: WHO, 2021), 8. Bibliography: World Health Organization. Sample Health Report. Geneva: WHO, 2021.	In text: (World Health Organization 2021, 8) Reference list: World Health Organization. 2021. Sample Health Report. Geneva: WHO.

These models show how the same source information shifts shape from one system to the other. When you adapt them, watch the small cues: placement of the year, use of italics, commas versus periods, and order of pieces. Those details separate a rough guess from a clean Chicago-style citation.

Practical Tips For Faster Chicago Style Work

By the time you finish a long paper, you may have dozens of citations to track. A few steady habits make that work easier. They also keep your paper easier to read and grade.

Keep A Citation Template Handy

Create a small document with patterns for the sources you use most: a book, a journal article, a chapter in an edited book, and a website. For each one, store both the notes-and-bibliography version and the author-date version. Each time you start a new paper, copy that file into your project folder and fill in the blanks as you read.

This simple move keeps you from starting from zero with every assignment. It also makes it less likely that you mix styles, since your template already nudges you toward one system at a time.

Capture Full Source Details As You Read

The toughest part of citation work often comes at the end, when you try to chase down missing page ranges or publication years. To avoid that stress, record full source details the moment you decide that a book, article, or website belongs in your paper. Note the author, title, journal or site name, volume and issue numbers, publisher, year, and page range.

Whether you use a citation manager, spreadsheet, or plain text file, recording details early saves many hours later. It also cuts down on mistakes such as missing years or misplaced page numbers in both your notes and your reference list.

Watch For Common Chicago Style Errors

Most Chicago style problems fall into a few patterns that you can catch with a short review:

• Mixing systems: footnotes in a paper that otherwise uses author-date, or parenthetical citations in a notes-and-bibliography paper.
• Missing page numbers in notes or in-text citations for direct quotations.
• Inconsistent use of italics for book and journal titles.
• Author names spelled one way in the text and another way in the bibliography or reference list.
• Entries out of alphabetical order in the bibliography or reference list.

Set aside a final pass through your paper that looks only at citations. Read every note and entry in the bibliography or reference list out loud or under your breath. That slow read makes spacing, punctuation, and spelling errors much easier to spot than when you skim silently.

Putting Chicago Style To Work In Your Writing

Once you know how to cite with Chicago style, the two systems feel less like obstacles and more like tools that present your research clearly. Notes-and-bibliography lets you keep the main text smooth while offering rich footnotes that guide curious readers. Author-date keeps attention on the timeline of your sources, which suits research that turns on recent findings and data trends.

If you treat Chicago style as a series of small, repeatable moves rather than a long list of exceptions, citations take less time and cause fewer headaches. Pick the system your assignment calls for, follow solid examples from trusted guides, and rely on templates and careful recordkeeping. Over time, you will build a natural sense for both systems and can switch between them with ease whenever a new class or project asks for a different version of Chicago.