To cite package ‘taxa’ in publications use:

  Zachary F, Scott C, Niklaus G (2018). _Taxa: An R package
  implementing data standards and methods for taxonomic data._, volume
  7 number 272. doi:10.12688/f1000research.14013.1
  <https://doi.org/10.12688/f1000research.14013.1>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Taxa: An R package implementing data standards and methods for taxonomic data.},
    author = {Foster Zachary and Chamberlain Scott and Grunwald Niklaus},
    journal = {F1000Research},
    year = {2018},
    volume = {7},
    number = {272},
    doi = {10.12688/f1000research.14013.1},
  }