Chicago Style Manuscript Formatting — Requirements & Checker
Validate papers against Chicago Manual of Style (17th edition) and Turabian format: footnote notes, bibliography formatting, author-date citations, and Chicago manuscript conventions.
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What is Chicago style?
The Chicago Manual of Style (CMOS, 17th edition) is one of the most widely used style guides in academic publishing. Chicago style has two systems: Notes-Bibliography (NB) used in history, literature, and the arts, which uses footnotes or endnotes with a bibliography; and Author-Date (AD) used in social sciences and natural sciences, which uses in-text parenthetical citations with a reference list. Turabian style (Kate Turabian's A Manual for Writers) is an adaptation of Chicago style for student papers and theses. Our checker validates both Chicago NB and Author-Date formats.
Chicago Manual of Style (17th edition) is one of the most nuanced and widely used style guides in academic publishing, covering everything from comma placement to footnotes for archival manuscript sources. While it can feel more complex than APA or MLA, understanding Chicago's two systems — Notes-Bibliography (NB) for humanities and Author-Date (AD) for social and natural sciences — is essential for submitting to journals in history, philosophy, art history, economics, and related fields.
Notes-Bibliography vs. Author-Date: Core Rules
Notes-Bibliography (NB) system is used in history, literature, and the arts. It uses footnotes or endnotes for citations, with a bibliography at the end of the paper.
- First footnote for a source: full citation — e.g., John Smith, Title of Book (Chicago: University of Chicago Press, 2020), 45.
- Subsequent footnotes for the same source: shortened form — Smith, Short Title, 45.
- Ibid. means "in the same place" — used when citing the same source as the immediately preceding note, with a new page if applicable. Chicago 17 notes that ibid. is now optional; shortened citations may always be used instead.
- Bibliography format differs from footnote format: author reversed (Lastname, Firstname), no specific page for the cited passage, full page range for articles.
Author-Date (AD) system is used in social sciences and natural sciences. It uses parenthetical in-text citations with a reference list titled "References."
- In-text: (Lastname Year, page) for direct quotes; (Lastname Year) for paraphrases.
- Reference list sorted alphabetically by author's last name.
- Book entry: Lastname, Firstname. Year. Title. City: Publisher.
Chicago Manuscript Formatting Requirements
- Font: Times New Roman 12pt for main text; 10pt for footnotes.
- Margins: 1 inch on all sides.
- Spacing: Double-spaced for the main text. Footnotes are single-spaced with a blank line between notes.
- Block quotations: Prose of 5 or more lines (approximately 100+ words) indented as a block without quotation marks.
- Page numbers: Arabic numerals, typically top right or bottom center. Front matter may use Roman numerals.
- No running head is required by Chicago, unlike APA or MLA.
- Word count limits: Vary widely by journal — Chicago itself does not mandate a word limit, but target journals typically require 6,000–10,000 words for research articles in humanities journals.
Common Desk Rejection Reasons for Chicago Style Papers
- System mismatch. Mixing NB and AD systems — using author-date in-text citations alongside footnotes, or including both a bibliography and a reference list. Each Chicago system is self-contained; mixing them immediately signals unfamiliarity with the style.
- Incorrect footnote vs. bibliography format. Footnote and bibliography entries follow different rules in NB style. Footnotes list the author as "Firstname Lastname" and end with specific page numbers; bibliographies list "Lastname, Firstname" and give the full page range for articles.
- Wrong section heading. NB uses "Bibliography"; AD uses "References." Submitting with "Works Cited" (MLA terminology) is caught immediately by editors.
- Ibid misuse. "Ibid." applies only to the immediately preceding footnote. Using it after an intervening note citing a different source is a common error that reviewers always notice.
- Missing full first citation. Chicago NB requires a full citation the first time a source is footnoted. Using a shortened form on the first appearance is incorrect and forces the reader to look up the bibliography before the full source is established.
Turabian Format for Theses and Dissertations
Turabian format (from Kate Turabian's A Manual for Writers, 9th edition) adapts Chicago style specifically for student theses and dissertations. It follows Chicago's NB or AD citation formats but adds detailed guidance on front matter (title page, table of contents, lists of figures), chapter formatting, and appendices. CheckMyManuscript validates both Chicago citation elements and Turabian's additional structural requirements for thesis submissions.
What CheckMyManuscript Catches for Chicago
Our automated validation checks Chicago footnote and bibliography format, ibid and shortened citation usage, author name formatting (NB vs AD differences), block quotation structure, and section heading conventions. We also validate that your bibliography or reference list contains all sources cited in notes and flag orphaned citations with no corresponding bibliography entry.
Also see: MLA format checker | APA format checker | Bibliography checker
Chicago style checks
Footnote formatting
Validate Chicago Notes-Bibliography footnote and endnote formatting.
Bibliography format
Check bibliography entries follow Chicago 17 formatting for all source types.
Author-date citations
Validate in-text author-year citations for Chicago Author-Date manuscripts.
Ibid and short citations
Check proper use of shortened citations for subsequent footnote references.
Title formatting
Validate that book titles are italicized and article titles are in quotation marks.
Page number format
Confirm correct page number formatting in footnotes and bibliography.
Checks relevant to this topic
Part of our 80+ automated checks
Footnote format
Footnotes correctly formatted per Chicago 17 NB style.
Bibliography
Bibliography entries in correct Chicago format.
Title styling
Books italicized, articles in quotes, consistently applied.
Ibid usage
Ibid and shortened citations used correctly for repeated sources.
The practical edge your peers already use
Across disciplines and career stages, researchers reduce bottlenecks and submit with confidence: clearer drafts, easier guideline compliance, and less back and forth with co‑authors and reviewers.
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Professor in Mechanical Engineering, ÉTS Montréal
I relied on it throughout my thesis to strengthen my writing. It suggested clearer phrasing, improved flow between sections, and ensured my references were complete before the final deadline.
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Master's Student in Speech Therapy
I write research in both Portuguese and English, and it adapts perfectly to either language. It provided precise feedback in Portuguese, helping me maintain academic tone and consistency across my drafts.
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PhD Candidate, UFPE
It gave excellent advice on how to rephrase and present ideas more clearly and concisely. The suggestions helped me refine my arguments and make my research more impactful.
Félix
Postdoc Researcher, Max Planck Institute for Evolutionary Biology
A round of suggestions helped to generally refine the text of my paper and, moreover, to present some of its key points in a more focused form.
Oleg
Professor, Pirogov Russian National Research Medical University
I use it to review my students' papers. It instantly highlights typos, missing references, and unclear sections, helping me focus my feedback on the quality of the research instead of surface errors.
Ilyass
Professor in Mechanical Engineering, ÉTS Montréal
I relied on it throughout my thesis to strengthen my writing. It suggested clearer phrasing, improved flow between sections, and ensured my references were complete before the final deadline.
Manon
Master's Student in Speech Therapy
I write research in both Portuguese and English, and it adapts perfectly to either language. It provided precise feedback in Portuguese, helping me maintain academic tone and consistency across my drafts.
Afonso
PhD Candidate, UFPE
It gave excellent advice on how to rephrase and present ideas more clearly and concisely. The suggestions helped me refine my arguments and make my research more impactful.
Félix
Postdoc Researcher, Max Planck Institute for Evolutionary Biology
A round of suggestions helped to generally refine the text of my paper and, moreover, to present some of its key points in a more focused form.
Oleg
Professor, Pirogov Russian National Research Medical University
Frequently asked questions
Notes-Bibliography is standard in humanities (history, literature, arts). Author-Date is used in social and natural sciences. Check your discipline or target journal's requirements. Student papers should follow their instructor's guidance.
Turabian style (from Kate Turabian's 'A Manual for Writers of Research Papers, Theses, and Dissertations', 9th ed.) is an adaptation of Chicago style for student papers and theses. It follows the same citation formats as Chicago but includes additional guidance on thesis and dissertation formatting.
Yes: many humanities journals (history, art history, classics, philosophy) use Chicago Notes-Bibliography style. Some social science journals use Chicago Author-Date. Always verify the specific journal's style requirements.
Chicago NB footnotes use a full citation on first reference: Author First Last, Title (City: Publisher, Year), page. Subsequent references use a shortened form: Last, Short Title, page. 'Ibid' can be used when citing the same source consecutively.
The five most common Chicago errors are: (1) mixing NB and AD systems in the same paper; (2) using the wrong heading — 'Works Cited' (MLA) instead of 'Bibliography' (NB) or 'References' (AD); (3) misusing 'ibid.' after an intervening different-source note; (4) formatting footnote and bibliography entries identically (they differ: footnote uses Firstname Lastname, bibliography reverses to Lastname, Firstname); (5) omitting the full citation on the first footnote reference to a source.