To cite package ‘rspatial’ in publications use:

Hijmans R (2020). rspatial: rspatial.org data. R package version 1.0-0, https://github.com/rspatial/rspatial.

Corresponding BibTeX entry:

  @Manual{,
    title = {rspatial: rspatial.org data},
    author = {Robert J. Hijmans},
    year = {2020},
    note = {R package version 1.0-0},
    url = {https://github.com/rspatial/rspatial},
  }