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

  LeBauer D, Dietze M, Kooper R, Serbin S, Cowdery E, Desai A, Fer I,
  Shiklomanov A, Gardella T, Black C, Burke L, Kelly R, Wang D,
  Davidson C, Feng X, Singh S (2021). _PEcAn.DB: PEcAn Functions Used
  for Ecological Forecasts and Reanalysis_. R package version
  1.7.2.9000, <https://github.com/pecanproject/pecan>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {PEcAn.DB: PEcAn Functions Used for Ecological Forecasts and Reanalysis},
    author = {David LeBauer and Mike Dietze and Rob Kooper and Shawn Serbin and Elizabeth Cowdery and Ankur Desai and Istem Fer and Alexey Shiklomanov and Tony Gardella and Chris Black and Liam Burke and Ryan Kelly and Dan Wang and Carl Davidson and Xiaohui Feng and Shashank Singh},
    year = {2021},
    note = {R package version 1.7.2.9000},
    url = {https://github.com/pecanproject/pecan},
  }