To cite package ‘peRspective’ in publications use:

  Votta F (2021). _peRspective: Interface to the 'Perspective' API_. R
  package version 0.1.1, <https://github.com/favstats/perspective>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {peRspective: Interface to the 'Perspective' API},
    author = {Fabio Votta},
    year = {2021},
    note = {R package version 0.1.1},
    url = {https://github.com/favstats/perspective},
  }