Chicago Manual of Style, 18th edition
Learn Chicago 18 citation with clear Notes–Bibliography and Author–Date comparisons, fictional learning examples, source checks, and official guidance.
Chicago has two citation systems: Notes–Bibliography and Author–Date. Both connect source-based work to complete bibliographic information, but they differ in the in-text pathway and the organization of details. Do not mix footnote-style notes with author–date parentheticals unless official assignment instructions call for it. Check a current course guide, sample paper, target journal, or publisher template before setting up the document.
A superscript number in the text points to a footnote or endnote, and a bibliography is commonly included. It is often used in humanities fields and can accommodate a wide range of sources, but the course or publisher determines the required system.
A parenthetical citation usually gives the author’s surname and year, connecting to a reference list. It is often used in sciences and social sciences, but an instructor, journal, or department may require a different choice.
The author, title, publisher, pages, date, and all citation forms here are invented for learning. They are not real publications, not evidence for a claim, and must not be copied into a submitted paper or bibliography. In a fictional Notes–Bibliography sequence, the text “The fictional archive changed the project’s evidence base.” may point to note 1: Mina Iqbal, Fictional Archive Methods (Learning City: Sample Press, 2025), 42. A later fictional note could use the shortened form: Iqbal, Fictional Archive Methods, 61. Its fictional bibliography entry is: Iqbal, Mina. Fictional Archive Methods. Learning City: Sample Press, 2025. In a fictional Author–Date sequence, the text might read: “The fictional archive changed the project’s evidence base (Iqbal 2025, 42).” The corresponding fictional reference-list entry is: Iqbal, Mina. 2025. Fictional Archive Methods. Learning City: Sample Press. Actual capitalization, punctuation, pages, and fields depend on source type and current requirements.
Citation formatting does not prove that a claim is accurate or that a source supports it. Keep original sources, record useful page or section locations, distinguish quotation from paraphrase in notes, and verify author, title, publication details, and persistent link before submitting. A generated reference is a draft based on data you provide; it cannot decide which Chicago system the assignment requires, locate missing data, or accept responsibility for accuracy.
The Chicago Manual of Style Citation Quick Guide describes Notes–Bibliography and Author–Date and advises writers to use the system required by their field or publisher. University of Kansas Writing Center identifies the 18th edition as current and provides examples of both systems. Purdue OWL's Chicago resource is useful for Notes–Bibliography structure but explicitly follows the 17th edition; defer to current official and submission-specific guidance.
The generator’s Chicago option produces a Notes–Bibliography style draft from verified metadata.
Review Works Cited and author-page citation structures for humanities assignments.
Review bracketed numbers and a reference list ordered by first use for technical work.
Keep source verification, quotation, paraphrase, and attribution visible.