To cite rcarbon in publications use:

Bevan A, Crema ER (2018). rcarbon: Methods for calibrating and analysing radiocarbon dates. https://github.com/ahb108/rcarbon.

Corresponding BibTeX entry:

  @Manual{,
    title = {rcarbon: Methods for calibrating and analysing radiocarbon
      dates},
    author = {Andrew Bevan and Enrico R. Crema},
    year = {2018},
    url = {https://github.com/ahb108/rcarbon},
  }