To cite the adephylo package:

  Jombart T, Balloux F, Dray S (2010). “adephylo: new tools for
  investigating the phylogenetic signal in biological traits.”
  _Bioinformatics_, *26*, 1907-1909. doi:10.1093/bioinformatics/btq292
  <https://doi.org/10.1093/bioinformatics/btq292>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {adephylo: new tools for investigating the phylogenetic signal in biological traits},
    journal = {Bioinformatics},
    year = {2010},
    author = {Thibaut Jombart and François Balloux and St\'ephane Dray},
    volume = {26},
    pages = {1907-1909},
    doi = {10.1093/bioinformatics/btq292},
  }