To cite package ‘fedregs’ in publications use:

  Large S (2019). _fedregs: Text Analysis of the US Code of Federal
  Regulations_. R package version 1.0.0,
  <https://github.com/slarge/fedregs>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fedregs: Text Analysis of the US Code of Federal Regulations},
    author = {Scott Large},
    year = {2019},
    note = {R package version 1.0.0},
    url = {https://github.com/slarge/fedregs},
  }