To cite package ‘PurpleAir’ in publications use:

  Brokamp C (2024). _PurpleAir: Query the 'PurpleAir' Application
  Programming Interface_. R package version 1.0.1,
  <https://CRAN.R-project.org/package=PurpleAir>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PurpleAir: Query the 'PurpleAir' Application Programming Interface},
    author = {Cole Brokamp},
    year = {2024},
    note = {R package version 1.0.1},
    url = {https://CRAN.R-project.org/package=PurpleAir},
  }