To cite package ‘memberstates’ in publications use:

Yetman C (2020). memberstates: List of member states of various international organizations. R package version 0.0.0.9000, https://github.com/cjyetman/memberstates.

Corresponding BibTeX entry:

  @Manual{,
    title = {memberstates: List of member states of various
      international organizations},
    author = {CJ Yetman},
    year = {2020},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/cjyetman/memberstates},
  }