To cite package ‘usdata’ in publications use:

Çetinkaya-Rundel M, Diez D, Dorazio L (2024). usdata: Data on the States and Counties of the United States. R package version 0.3.1, https://github.com/openintrostat/usdata.

Corresponding BibTeX entry:

  @Manual{,
    title = {usdata: Data on the States and Counties of the United
      States},
    author = {Mine Çetinkaya-Rundel and David Diez and Leah Dorazio},
    year = {2024},
    note = {R package version 0.3.1},
    url = {https://github.com/openintrostat/usdata},
  }