To cite package ‘apportion’ in publications use:

  Kenny C (2024). _apportion: Apportion Seats_. R package version
  0.0.1, , <https://github.com/christopherkenny/apportion>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {apportion: Apportion Seats},
    author = {Christopher T. Kenny},
    year = {2024},
    note = {R package version 0.0.1, 
},
    url = {https://github.com/christopherkenny/apportion},
  }