To cite package ‘bpDir’ in publications use:

  Buttarazzi D (2026). _bpDir: Boxplots for Directional Data_. R
  package version 0.2.6, <https://CRAN.R-project.org/package=bpDir>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {bpDir: Boxplots for Directional Data},
    author = {Davide Buttarazzi},
    year = {2026},
    note = {R package version 0.2.6},
    url = {https://CRAN.R-project.org/package=bpDir},
  }