To cite package ‘proxyconfig’ in publications use:

  Dervieux C (2019). _proxyconfig: Tools to Configure Proxy
  Interactively_. R package version 0.0.0.9002,
  <https://github.com/cderv/proxyconfig>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {proxyconfig: Tools to Configure Proxy Interactively},
    author = {Christophe Dervieux},
    year = {2019},
    note = {R package version 0.0.0.9002},
    url = {https://github.com/cderv/proxyconfig},
  }