To cite package ‘certify’ in publications use:

  Wimpy C (2026). _certify: Generate Branded PDF Certificates_. R
  package version 0.1.0, <https://CRAN.R-project.org/package=certify>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {certify: Generate Branded PDF Certificates},
    author = {Cameron Wimpy},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=certify},
  }