To cite FedData in publications use:

Bocinsky, R. Kyle. (2016). FedData: Functions to Automate Downloading Geospatial Data Available from Several Federated Data Sources. URL: http://CRAN.R-project.org/package=FedData. R package version 2.3.2

Corresponding BibTeX entry:

  @Manual{,
    title = {{FedData}: Functions to Automate Downloading Geospatial
      Data Available from Several Federated Data Sources},
    author = {R. Kyle Bocinsky},
    note = {R package version 2.3.2},
    year = {2016},
    url = {https://cran.r-project.org/package=FedData},
  }