To cite package ‘usethis’ in publications use:

  Wickham H, Bryan J, Barrett M, Teucher A (2024). _usethis: Automate
  Package and Project Setup_. R package version 3.1.0,
  <https://CRAN.R-project.org/package=usethis>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {usethis: Automate Package and Project Setup},
    author = {Hadley Wickham and Jennifer Bryan and Malcolm Barrett and Andy Teucher},
    year = {2024},
    note = {R package version 3.1.0},
    url = {https://CRAN.R-project.org/package=usethis},
  }