To cite package ‘fam.recrisk’ in publications use:

  Daniel S, Sinnwell J (2018). _fam.recrisk: Familial Recurrence Risk_.
  R package version 0.1,
  <https://CRAN.R-project.org/package=fam.recrisk>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fam.recrisk: Familial Recurrence Risk},
    author = {Schaid Daniel and Jason Sinnwell},
    year = {2018},
    note = {R package version 0.1},
    url = {https://CRAN.R-project.org/package=fam.recrisk},
  }