To cite purgeR in publications use:

  López-Cortegano E (2022). “purgeR: Inbreeding and purging in
  pedigreed populations.” _Bioinformatics_.
  <https://doi.org/10.1093/bioinformatics/btab599>.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Eugenio López-Cortegano},
    title = {purgeR: Inbreeding and purging in pedigreed populations},
    journal = {Bioinformatics},
    year = {2022},
    url = {https://doi.org/10.1093/bioinformatics/btab599},
  }