To cite package ‘PEcAn.priors’ in publications use:

  LeBauer D (2021). _PEcAn.priors: PEcAn Functions Used to Estimate
  Priors from Data_. R package version 1.7.2,
  <https://github.com/pecanproject/pecan>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PEcAn.priors: PEcAn Functions Used to Estimate Priors from Data},
    author = {David LeBauer},
    year = {2021},
    note = {R package version 1.7.2},
    url = {https://github.com/pecanproject/pecan},
  }