To cite package ‘groupr’ in publications use:

Griffiths N (2023). groupr: Groups with Inapplicable Values. R package version 0.1.2, https://github.com/ngriffiths21/groupr.

Corresponding BibTeX entry:

  @Manual{,
    title = {groupr: Groups with Inapplicable Values},
    author = {Nicholas Griffiths},
    year = {2023},
    note = {R package version 0.1.2},
    url = {https://github.com/ngriffiths21/groupr},
  }