To cite rcarbon in publications use:

Bevan, A. and Crema, E.R. (2018) rcarbon v1.2.0: Methods for calibrating and analysing radiocarbon dates URL: https://CRAN.R-project.org/package=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},
  }