To cite package ‘decontam’ in publications use:

  Davis NM, Proctor D, Holmes SP, Relman DA, Callahan BJ (2017).
  “Simple statistical identification and removal of contaminant
  sequences in marker-gene and metagenomics data.” _bioRxiv_, 221499.
  doi:10.1101/221499 <https://doi.org/10.1101/221499>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Simple statistical identification and removal of contaminant sequences in marker-gene and metagenomics data},
    author = {Nicole M Davis and Diana Proctor and Susan P Holmes and David A Relman and Benjamin J Callahan},
    journal = {bioRxiv},
    pages = {221499},
    year = {2017},
    doi = {10.1101/221499},
  }