To cite package ‘FourScores’ in publications use:

Speidel M (2018). FourScores: A Game for Human vs. Human or Human vs. AI. R package version 1.5.1, https://CRAN.R-project.org/package=FourScores.

Corresponding BibTeX entry:

  @Manual{,
    title = {FourScores: A Game for Human vs. Human or Human vs. AI},
    author = {Matthias Speidel},
    year = {2018},
    note = {R package version 1.5.1},
    url = {https://CRAN.R-project.org/package=FourScores},
  }