To cite package ‘munch’ in publications use:

  Müller K, Schieferdecker T, Knecht T (2022). _munch: Functions for
  working with the historicized list of communes of Switzerland_. R
  package version 0.0.8.9007, , <https://github.com/cynkra/munch>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {munch: Functions for working with the historicized list of communes of
Switzerland},
    author = {Kirill Müller and Tobias Schieferdecker and Thomas Knecht},
    year = {2022},
    note = {R package version 0.0.8.9007, },
    url = {https://github.com/cynkra/munch},
  }