To cite package ‘beastier’ in publications use:

  Bilderbeek RJ, Etienne RS (2008). “babette: BEAUti 2, BEAST 2 and
  Tracer for R.” _Methods in Ecology and Evolution_.
  doi:10.1111/2041-210X.13032
  <https://doi.org/10.1111/2041-210X.13032>.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Richèl JC Bilderbeek and Rampal S Etienne},
    title = {babette: BEAUti 2, BEAST 2 and Tracer for R},
    journal = {Methods in Ecology and Evolution},
    year = {2008},
    doi = {10.1111/2041-210X.13032},
  }