To cite package ‘rgrass’ in publications use:

  Bivand R, Pawley S (2025). _rgrass: Interface Between 'GRASS'
  Geographical Information System and 'R'_. R package version 0.5-2,
  <https://CRAN.R-project.org/package=rgrass>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rgrass: Interface Between 'GRASS' Geographical Information System and
'R'},
    author = {Roger Bivand and Steven Pawley},
    year = {2025},
    note = {R package version 0.5-2},
    url = {https://CRAN.R-project.org/package=rgrass},
  }