To cite package ‘gaussfacts’ in publications use:

  Eddelbuettel D, Cavers M (2021). _gaussfacts: The Greatest
  Mathematician Since Antiquity_. R package version 0.0.2.1, ,
  <https://github.com/eddelbuettel/gaussfacts>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gaussfacts: The Greatest Mathematician Since Antiquity},
    author = {Dirk Eddelbuettel and Mike Cavers},
    year = {2021},
    note = {R package version 0.0.2.1, 
},
    url = {https://github.com/eddelbuettel/gaussfacts},
  }