To cite package ‘msos’ in publications use:

  Marden J (2024). _msos: Data Sets and Functions Used in Multivariate
  Statistics: Old School by John Marden_. R package version 1.2.0, ,
  <https://github.com/coatless-rpkg/msos>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {msos: Data Sets and Functions Used in Multivariate Statistics: Old
School by John Marden},
    author = {John Marden},
    year = {2024},
    note = {R package version 1.2.0, 
},
    url = {https://github.com/coatless-rpkg/msos},
  }