To cite package ‘MKclass’ in publications use:

  Kohl M (2023). _MKclass: Statistical Classification_. R package
  version 0.5, <https://github.com/stamats/MKclass>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{MKclass: Statistical Classification}},
    author = {Matthias Kohl},
    language = {English},
    year = {2023},
    note = {R package version 0.5},
    url = {https://github.com/stamats/MKclass},
  }