To cite package ‘Hotelling’ in publications use:

  Curran J, Hersh T (2021). _Hotelling: Hotelling's T^2 Test and
  Variants_. R package version 1.0-8,
  <https://github.com/jmcurran/hotelling>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Hotelling: Hotelling's T^2 Test and Variants},
    author = {James Curran and Taylor Hersh},
    year = {2021},
    note = {R package version 1.0-8},
    url = {https://github.com/jmcurran/hotelling},
  }