To cite package ‘phrapl’ in publications use:

  O'Meara B, Carstens B, Jackson N, Morales-Garcia A (2021). _phrapl:
  Phylogeography using Approximate Likelihood_. R package version
  0.6.5, <https://github.com/bomeara/phrapl>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {phrapl: Phylogeography using Approximate Likelihood},
    author = {Brian O'Meara and Bryan Carstens and Nathan Jackson and Ariadna Morales-Garcia},
    year = {2021},
    note = {R package version 0.6.5},
    url = {https://github.com/bomeara/phrapl},
  }