To cite package ‘packrat’ in publications use:

Atkins A, Allen T, Ushey K, McPherson J, Cheng J, Allaire J (2026). packrat: A Dependency Management System for Projects and their R Package Dependencies. R package version 0.9.3.9000, https://github.com/rstudio/packrat.

Corresponding BibTeX entry:

  @Manual{,
    title = {packrat: A Dependency Management System for Projects and
      their R Package Dependencies},
    author = {Aron Atkins and Toph Allen and Kevin Ushey and Jonathan
      McPherson and Joe Cheng and JJ Allaire},
    year = {2026},
    note = {R package version 0.9.3.9000},
    url = {https://github.com/rstudio/packrat},
  }