To cite package 'RPublica' in publications use:

  Thomas J. Leeper (). RPublica: ProPublica API Client. R package
  version 0.1.3.9000.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {RPublica: ProPublica API Client},
    author = {Thomas J. Leeper},
    note = {R package version 0.1.3.9000},
  }