To cite package ‘r3’ in publications use:

  Johnston L (2026). _r3: Companion Package for Rostools R Workshops_.
  R package version 0.8.3, <https://github.com/rostools/r3>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {r3: Companion Package for Rostools R Workshops},
    author = {Luke Johnston},
    year = {2026},
    note = {R package version 0.8.3},
    url = {https://github.com/rostools/r3},
  }