To cite package ‘openaq’ in publications use:

  Biggs R, Parker C (2026). _openaq: Access Air Quality Data from the
  'OpenAQ' API_. R package version 1.0.0,
  <https://github.com/openaq/openaq-r>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {openaq: Access Air Quality Data from the 'OpenAQ' API},
    author = {Russ Biggs and Christian Parker},
    year = {2026},
    note = {R package version 1.0.0},
    url = {https://github.com/openaq/openaq-r},
  }