To cite quincunx in publications use:

  Ramiro Magno, Isabel Duarte, Ana-Teresa Maia, quincunx: an R package
  to query, download and wrangle PGS Catalog data, Bioinformatics,
  btab522, 16 July 2021, Pages 1-3,
  https://doi.org/10.1093/bioinformatics/btab522

A BibTeX entry for LaTeX users is

  @Article{,
    title = {quincunx: an R package to query, download and wrangle PGS Catalog data},
    author = {Ramiro Magno and Isabel Duarte and Ana-Teresa Maia},
    journal = {Bioinformatics},
    year = {2021},
    pages = {1--3},
    url = {https://doi.org/10.1093/bioinformatics/btab522},
  }