To cite package ‘screening’ in publications use:

Last F (2016). screening: What the Package Does (one line, title case). R package version 0.0.0.9000, https://github.com/wwrechard/screening.

Corresponding BibTeX entry:

  @Manual{,
    title = {screening: What the Package Does (one line, title case)},
    author = {First Last},
    year = {2016},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/wwrechard/screening},
  }