To cite package ‘arrg’ in publications use:

  Clayden J (2024). _arrg: Flexible Argument Parsing for R Scripts_. R
  package version 0.1.0, <https://github.com/jonclayden/arrg>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {arrg: Flexible Argument Parsing for R Scripts},
    author = {Jon Clayden},
    year = {2024},
    note = {R package version 0.1.0},
    url = {https://github.com/jonclayden/arrg},
  }