To cite package ‘plnr’ in publications use:

  Richard Aubrey White (2025). _plnr: A System for Planing Analyses_.
  doi:10.32614/CRAN.package.plnr
  <https://doi.org/10.32614/CRAN.package.plnr>.
  <https://www.rwhite.no/plnr/>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {plnr: A System for Planing Analyses},
    author = {{Richard Aubrey White}},
    address = {Oslo, Norway},
    year = {2025},
    url = {https://www.rwhite.no/plnr/},
    doi = {10.32614/CRAN.package.plnr},
  }