To cite package ‘TreEvo’ in publications use:

  O'Meara B, Bapst D, Banbury B (2012). _TreEvo: Using ABC to
  Understand Trait Evolution_. R package version 0.22.1,
  <https://github.com/bomeara/treevo>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {TreEvo: Using ABC to Understand Trait Evolution},
    author = {Brian O'Meara and David Bapst and Barb Banbury},
    year = {2012},
    note = {R package version 0.22.1},
    url = {https://github.com/bomeara/treevo},
  }