To cite package ‘csmaps’ in publications use:

  White RA, Zhang C (2025). _csmaps: Preformatted Maps of Norway that
  Don't Need Geolibraries_. R package version 2025.8.21,
  <https://CRAN.R-project.org/package=csmaps>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {csmaps: Preformatted Maps of Norway that Don't Need Geolibraries},
    author = {Richard Aubrey White and Chi Zhang},
    year = {2025},
    note = {R package version 2025.8.21},
    url = {https://CRAN.R-project.org/package=csmaps},
  }