To cite rmangal use:

  Vissault S, Cazelles K, Bergeron G, Mercier B, Violet C, Gravel D,
  Poisot T (2020). _rmangal: An R package to interact with Mangal
  database_. R package version 2.1.3,
  <https://docs.ropensci.org/rmangal/>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rmangal: An R package to interact with Mangal database},
    author = {Steve Vissault and Kevin Cazelles and Gabriel Bergeron and Benjamin Mercier and Clément Violet and Dominique Gravel and Timothée Poisot},
    year = {2020},
    note = {R package version 2.1.3},
    url = {https://docs.ropensci.org/rmangal/},
  }