Hanson JO (2020) wdpar: Interface to the World Database on Protected Areas. R package version 1.0.4. https://CRAN.R-project.org/package=wdpar

@Manual{,
  author = {Jeffrey O Hanson},
  title = {wdpar: Interface to the World Database on Protected Areas},
  year = {2020},
  note = {R package version 1.0.4},
  url = {https://CRAN.R-project.org/package=wdpar},
}

UNEP-WCMC and IUCN (2020) Protected Planet: The World Database on Protected Areas (WDPA), [insert month/year of the version downloaded], Cambridge, UK: UNEP-WCMC and IUCN. Available at: www.protectedplanet.net.

@Manual{,
  author = {{UNEP-WCMC} and {IUCN}},
  title = {Protected Planet: The World Database on Protected Areas (WDPA)},
  year = {2020},
  publisher = {UNEP-WCMC and IUCN},
  publisheraddress = {Cambridge, UK},
  url = {https://www.protectedplanet.net/en},
}