Website
Website example
University of Chicago Press. 2024. "Chicago Manual of Style." The Chicago Manual of Style Online. March 15, 2024. https://www.chicagomanualofstyle.org/.
History & Fine Arts citation style
Free Chicago author-date 18th edition Citation Generator
Chicago author-date 18th edition is one of two Chicago Manual of Style citation systems. It uses parenthetical citations with author and year, ideal for sciences and social sciences.
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Chicago Author-Date 18Journal article
Smith, Jane A., and Mark B. Doe. 2024. "The Effects of Climate Change on Coastal Ecosystems." Journal of Environmental Science 45 (3): 234–51.
Book
Smith, Jane A. 2023. Coastal Ecosystems in a Changing Climate. 2nd ed. Cambridge: Cambridge University Press.
Website
National Oceanic and Atmospheric Administration. 2024. "Climate Change Indicators: Sea Surface Temperature." NOAA Climate.gov. https://www.climate.gov/news-features/sea-surface-temperature.
In-text
(Smith and Doe 2024, 237)
Sample formatted to the official Chicago author-date 18th edition rules. Your real citation fills in from any URL, DOI, or ISBN.
Chicago author-date 18th edition Citation Examples
See how to format different source types in Chicago author-date 18th edition.
Journal article
Journal article example
Smith, John, and Mary Doe. 2024. "Historical Perspectives on Art." Art History 45, no. 2: 123-45.
Book
Book example
Brown, Charles. 2023. The History of Art. 3rd ed. Chicago: Academic Press.
Quick Chicago author-date 18th edition Rules
Author Format
Last name, First name. Use 'and' before last author.
Title Format
Title case for article titles in quotation marks. Italicize book and journal titles.
Date Format
Year in parentheses follows author in reference list. Use month day, year for web sources.
Journal/Source
Journal name italicized, volume number, issue number (in parentheses), year, and page range.
In-text Citations
Use parenthetical author-date format: (Author Year) or (Author Year, page number) for direct quotes.
Chicago author-date 18th edition Frequently Asked Questions
What is Chicago Author-Date style?
Chicago Author-Date is one of two Chicago Manual of Style systems. It uses parenthetical citations (Author Year) and is preferred for sciences and social sciences.
How do I cite a website in Chicago Author-Date?
Include author, year, page title in quotation marks, website name italicized, full date, and URL.
When should I use Chicago Author-Date vs Notes-Bibliography?
Author-Date is preferred for sciences and social sciences. Notes-Bibliography is preferred for humanities, literature, and arts.
How do I format in-text citations in Chicago Author-Date?
Use (Author Year) for paraphrases and (Author Year, page) for direct quotes. For narrative citations, use Author (Year).
Chicago author-date 18th edition Citation Guides
How to Cite Sources in Chicago Author-Date Style
Chicago 18th edition author-date citations: parenthetical in-text references, reference list format, and examples for the sciences and social sciences.
How to Use a Chicago 18th Edition Citation Generator
The ten checks that catch what a Chicago 18th edition citation generator gets wrong: stale publisher cities, et al. counts, ibid., and Turabian drift.
How to Alphabetize a Bibliography in Chicago Style
The Chicago 18th edition rules to alphabetize a bibliography: word-by-word order, same-author works, coauthors, Mc and Mac, particles, numbers, and no author.
How to Write an Annotated Bibliography in Chicago Style
Format an annotated bibliography in Chicago 18th edition: both annotation layouts from section 13.68, page setup, seven worked entries, and common fixes.
How to Cite Sources in Chicago Notes-Bibliography Style
A practical guide to the Chicago 18th edition notes-bibliography system: footnotes, bibliography entries, and worked examples for common source types.
How to Check If a Citation Is Real Before You Submit
The four levels of checking whether a citation is real: identifier resolution, metadata match, publication confirmation, and what the source actually says.
How to Cite a Source You Can't Find or Access
What APA 7, MLA 9, and Chicago say about secondary citations, paywalled papers, dead links, and quotes whose original source has vanished.
How to Write an Annotated Bibliography
How to write an annotated bibliography in APA 7, MLA 9, and Chicago, with real examples, formatting rules, and what makes a strong annotation.
Complete Guide to In-Text Citations
Everything you need to know about in-text citations across APA, MLA, Chicago, Harvard, and IEEE - with examples for every situation.
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Complete guide to citing YouTube videos in APA 7, MLA 9, Chicago, Harvard, IEEE, and Vancouver formats - with templates, worked examples, and special cases.