Chicago in-text citation can mean two different things because Chicago style has two main systems: notes-bibliography and author-date. In history and many humanities courses, students usually cite sources with footnotes or endnotes.
In some social science courses, they may use author-date citations in parentheses. This guide explains both Chicago systems, shows how they work in real sentences, and helps you choose the right format for your assignment.
Quick Answer to Chicago In-Text Citation
Chicago style has two main citation systems:
Chicago System | In-Text Citation Method | Commonly Used In |
|---|---|---|
Notes-bibliography | Footnotes or endnotes | History, humanities, arts, literature |
Author-date | Parenthetical author-date citations | Social sciences and some sciences |
In Chicago notes-bibliography style, the citation appears as a superscript number in the text, leading to a footnote or endnote.
Example:
Student writing often improves when feedback is given before the final draft.¹
Footnote:
Rebecca Miller, Writing with Evidence in College (Boston: Beacon Academic Press, 2023), 42.
In Chicago author-date style, the citation appears in parentheses.
Example:
Student writing often improves when feedback is given before the final draft (Miller 2023, 42).
Both are Chicago style, but they are not interchangeable. Use the system your instructor requires.
What Is Chicago In-Text Citation?
A Chicago in-text citation shows readers where a quote, paraphrase, statistic, or idea came from. The exact format depends on whether your paper uses the notes-bibliography system or the author-date system.
The Chicago Manual of Style explains both systems and is the main authority for Chicago citation rules. Students can review the official Chicago Manual of Style citation guide for examples of books, journal articles, websites, and other sources.
Chicago style is common in:
history
art history
literature
philosophy
religion
humanities
some social sciences
publishing and editing courses
Before writing citations, check whether your assignment says Chicago notes, Chicago bibliography, Chicago footnotes, or Chicago author-date. These terms point to different citation formats.
Chicago Notes-Bibliography In-Text Citation
The notes-bibliography system uses superscript numbers in the text. Each number points to a footnote at the bottom of the page or an endnote at the end of the paper.
Sentence with superscript citation:
The New Deal changed the relationship between the federal government and American workers.¹
Footnote:
Maria Johnson, Labor and Reform in Modern America (Chicago: Northview Press, 2021), 88.
The superscript number is the in-text marker. The note gives the source details. If your paper also has a bibliography, the full source appears again at the end in bibliography format.
Chicago Footnotes vs. Endnotes
Footnotes appear at the bottom of the page where the citation occurs. Endnotes appear together at the end of the paper or chapter.
Note Type | Location | Best For |
|---|---|---|
Footnote | Bottom of the page | Easy reader access while reading |
Endnote | End of paper or chapter | Cleaner page layout |
Bibliography | End of paper | Full list of sources used |
Many history instructors prefer footnotes because they let readers check source details without flipping to the end. However, some assignments allow endnotes. Follow your professor’s instructions.
Chicago Author-Date In-Text Citation
Chicago author-date style uses parenthetical citations in the text. It looks similar to APA, but the punctuation is different.
Basic format:
(Author Year, Page)
Example:
Student writing often improves when feedback is given before the final draft (Miller 2023, 42).
If the author’s name appears in the sentence, place the year and page number after the name or at the end of the sentence.
Narrative example:
Miller (2023, 42) argues that feedback is most useful when students can apply it before the final draft.
In author-date style, the full source appears in a reference list at the end of the paper.
Complete Chicago In-Text Citation Example
Here is the same book cited in both Chicago systems.
Source information:
Author: Rebecca Miller
Book title: Writing With Evidence in College
Publisher: Beacon Academic Press
Place of publication: Boston
Year: 2023
Page cited: 42
Notes-Bibliography Example
Sentence in the paper:
Student writing often improves when feedback is given before the final draft.¹
Footnote:
Rebecca Miller, Writing with Evidence in College (Boston: Beacon Academic Press, 2023), 42.
Bibliography entry:
Miller, Rebecca. Writing with Evidence in College. Boston: Beacon Academic Press, 2023.
This example is correct because the superscript number in the sentence points to a footnote. The footnote includes the author’s full name, italicized book title, publication details in parentheses, and the specific page number. The bibliography entry reverses the author’s name and uses slightly different punctuation.
Author-Date Example
Sentence in the paper:
Student writing often improves when feedback is given before the final draft (Miller 2023, 42).
Reference list entry:
Miller, Rebecca. 2023. Writing with Evidence in College. Boston: Beacon Academic Press.
This example is correct because the in-text citation includes the author’s last name, year, and page number. The reference list entry places the year after the author’s name, which helps readers match it to the parenthetical citation.
Chicago In-Text Citation for Books
Books are common sources in Chicago style, especially in history and humanities writing.
Notes-bibliography footnote:
Daniel Carter, Cities and Social Change (New York: Academic Press, 2020), 115.
Author-date citation:
(Carter 2020, 115)
If you cite the same book again in notes-bibliography style, your instructor may allow a shortened note.
Shortened note:
Carter, Cities and Social Change, 118.
Shortened notes help avoid repeating the full citation every time.
Chicago In-Text Citation for Journal Articles
Journal articles are also common in Chicago papers.
Notes-bibliography footnote:
Laura Chen, “Student Activism and Campus Reform,” Journal of American Education 18, no. 2 (2022): 47.
Author-date citation:
(Chen 2022, 47)
Bibliography entry:
Chen, Laura. “Student Activism and Campus Reform.” Journal of American Education 18, no. 2 (2022): 40–62.
For journal articles, the note usually includes the page being cited, while the bibliography entry includes the full page range of the article.
Chicago In-Text Citation for Websites
Websites may be cited in Chicago style, but students should use reliable sources such as universities, museums, government agencies, libraries, academic organizations, or established publications.
Notes-bibliography footnote:
Library of Congress, “The Civil Rights Act of 1964,” accessed June 26, 2026, https://www.loc.gov/example.
Author-date citation:
(Library of Congress 2026)
If a webpage has a publication or update date, use that date. If no date is available, an access date may be helpful, especially for pages that can change.
Chicago In-Text Citation With No Author
If a source has no personal author, use the organization as the author when one is responsible for the content.
Author-date example:
(National Archives 2024)
If there is no author or organization, use a shortened version of the title.
Author-date example:
(“Guide to Historical Research” 2023)
In notes-bibliography style, the note may begin with the title if no author is available.
Footnote example:
“Guide to Historical Research,” University History Center, March 4, 2023, https://www.example.edu/history-guide.
Do not invent an author. Use the source information that is clearly provided.
Chicago In-Text Citation vs. APA and MLA
Chicago citations can look similar to APA or MLA, but the rules are different.
Style | In-Text Example | Final Source Page |
|---|---|---|
Chicago notes-bibliography | Superscript number + footnote | Bibliography |
Chicago author-date | (Miller 2023, 42) | References |
APA | (Miller, 2023, p. 42) | References |
MLA | (Miller 42) | Works Cited |
A common mistake is writing a Chicago author-date citation with APA punctuation. Chicago uses (Miller 2023, 42), not (Miller, 2023, p. 42).
Common Chicago In-Text Citation Mistakes
Mistake | Correct Approach |
|---|---|
Mixing notes-bibliography and author-date | Use one Chicago system throughout the paper. |
Using APA punctuation in Chicago author-date | Write (Smith 2023, 45), not (Smith, 2023, p. 45). |
Forgetting page numbers for specific evidence | Include page numbers when quoting or citing a specific passage. |
Using only a bibliography without in-text notes | Add footnotes, endnotes, or author-date citations as required. |
Repeating full notes every time | Use shortened notes after the first full note when allowed. |
Confusing footnotes with bibliography entries | Notes and bibliography entries use different formats. |
Citing unreliable websites | Use credible academic, government, museum, or library sources. |
Tips for Checking Chicago In-Text Citations
First, confirm which Chicago system your instructor wants. This is the most important step. A footnote paper and an author-date paper should not be formatted the same way.
Next, check each citation against the source type. Books, journal articles, websites, and edited chapters all have different note and bibliography formats.
Then review page numbers. Chicago citations often point readers to specific pages, especially in history and humanities papers. If you quote or discuss a specific passage, include the exact page number.
Finally, make sure the final source page matches the system. Notes-bibliography papers often use a Bibliography. Author-date papers use References.
FAQ About Chicago In-Text Citation
What is a Chicago in-text citation?
A Chicago in-text citation is a source marker inside the paper. It may be a superscript number leading to a footnote or a parenthetical author-date citation, depending on the Chicago system used.
Does Chicago use footnotes or in-text citations?
Chicago can use both. Notes-bibliography style uses footnotes or endnotes. Author-date style uses parenthetical citations.
What does a Chicago author-date citation look like?
A Chicago author-date citation usually looks like (Smith 2023, 45). It includes the author’s last name, year, and page number when needed.
What does a Chicago footnote citation look like?
A Chicago footnote usually includes the author, title, publication information, and page number. For example: Rebecca Miller, Writing with Evidence in College (Boston: Beacon Academic Press, 2023), 42.
Is Chicago in-text citation the same as APA?
No. Chicago author-date style looks similar to APA, but the punctuation is different. Chicago notes-bibliography style uses footnotes or endnotes instead of author-date parentheses.
Do Chicago citations need page numbers?
Page numbers are usually needed when quoting or citing a specific passage. They help readers find the exact part of the source you used.
Conclusion
Chicago in-text citation depends on which Chicago system your instructor requires. Notes-bibliography style uses superscript numbers with footnotes or endnotes, while author-date style uses parenthetical citations such as (Miller 2023, 42). Before submitting your paper, check the assignment instructions, keep one system consistent, include page numbers for specific evidence, and make sure your notes, references, or bibliography match the citations in your text.