Please cite 'warbleR' as follows:

Araya-Salas M (2018). “NatureSounds: a collection of animal sound for bioacoustic analysis in the R environment.” https://github.com/maRce10/NatureSounds.

Corresponding BibTeX entry:

  @Misc{,
    title = {NatureSounds: a collection of animal sound for bioacoustic
      analysis in the R environment},
    author = {M. Araya-Salas},
    year = {2018},
    url = {https://github.com/maRce10/NatureSounds},
  }