To cite package ‘choroplethrAdmin1’ in publications use:

  Lamstein A (2024). _choroplethrAdmin1: Contains an
  Administrative-Level-1 Map of the World_. R package version 1.1.1,
  <https://github.com/arilamstein/choroplethradmin1>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {choroplethrAdmin1: Contains an Administrative-Level-1 Map of the World},
    author = {Ari Lamstein},
    year = {2024},
    note = {R package version 1.1.1},
    url = {https://github.com/arilamstein/choroplethradmin1},
  }