How to Cite Software in Chicago 18th edition (notes and bibliography)

Programs, applications, code repositories, and software packages.

Example in Chicago 18th edition (notes and bibliography)

R Core Team. R: A Language and Environment for Statistical Computing. V. 4.3.2. R Foundation for Statistical Computing, released 2023. https://www.R-project.org/.
Footnote R Core Team, R: A Language and Environment for Statistical Computing, v. 4.3.2, R Foundation for Statistical Computing, released 2023, https://www.R-project.org/.

What Chicago 18th edition (notes and bibliography) includes

These are the details of the example above that the style prints, so they are the ones to collect for your own source.

  • Software Name
  • Author(s)/Developer(s)
  • Publisher/Organization
  • Version
  • Release Date
  • URL

Check the repository (GitHub, GitLab) for version number, release date, and contributors. README files often contain the preferred citation format.

The formatting comes from the style's own file, so check the finer points against your guide. What to check by hand in Chicago 18th edition (notes and bibliography).

Software in other styles

APA 7th edition MLA 9th edition Harvard (Cite Them Right 12th edition) IEEE Vancouver

Other sources in Chicago 18th edition (notes and bibliography)

Website Book Journal Article Newspaper Article Book Chapter Thesis/Dissertation Report Video Podcast/Broadcast Magazine Article Dataset Patent Legal Case Legislation Bill Regulation Hearing Standard Treaty Conference Paper Manuscript Review Book Review Classic Work Reference Entry Dictionary Entry Encyclopedia Entry Periodical Collection Interview Speech Song Musical Score Graphic Figure Map Performance Event Pamphlet Preprint Document Post Blog Post Personal Communication Generative AI