How to Cite Software in Chicago

Cite software and apps when you name a specific program your work depends on; common tools such as Word need no citation. This page follows Chicago 18th edition (notes and bibliography), 18th edition (2024).

Chicago format for software

Chicago 18th edition (notes and bibliography)

Bibliography entry

R Core Team. R: A Language and Environment for Statistical Computing. Version 4.3.1. R Foundation for Statistical Computing, 2023. https://www.R-project.org/.

Footnote

R Core Team, R: A Language and Environment for Statistical Computing, Version 4.3.1 (R Foundation for Statistical Computing, 2023), https://www.R-project.org/.

Later footnotes

R Core Team, R: A Language and Environment for Statistical Computing.

Style: Chicago 18th edition (notes and bibliography)

Or enter it yourself:

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Date published (required)

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Preview: Chicago 18th edition (notes and bibliography)

Bibliography (0)

Your citations appear here, formatted in Chicago 18th edition (notes and bibliography). They are saved in this browser only: nothing is sent to us, and no account is needed.

    Where to find the details

    • The version is under About or Help; R, Python packages and Stata print their own suggested citation.

    Required in most styles: author or organisation, date published, name.

    Cite software in another style

    Other sources

    Questions

    What do I need to cite software in Chicago?

    At minimum: author or organisation, date published, name. The version is under About or Help; R, Python packages and Stata print their own suggested citation.

    What does software look like in Chicago?

    Bibliography entry: R Core Team. R: A Language and Environment for Statistical Computing. Version 4.3.1. R Foundation for Statistical Computing, 2023. https://www.R-project.org/. Footnote: R Core Team, R: A Language and Environment for Statistical Computing, Version 4.3.1 (R Foundation for Statistical Computing, 2023), https://www.R-project.org/.

    Is this free?

    Yes. No account and no limit. Your bibliography is saved in this browser only, and you can export it to Word, BibTeX, RIS or CSL-JSON.

    Citations are formatted by citeproc-js by Frank Bennett (CPAL-1.0, or AGPL-1.0), the engine behind Zotero and Mendeley, running the official Citation Style Language styles (10,863 styles, commit 2e93558) and locales (commit a89adec), used under CC BY-SA 3.0. AGLC4 citations use the LexIntellect AGLC4 engine, checked against the Guide's worked examples. Always check a citation against the manual or your institution's guide before you submit.