To cite package ‘zctaCrosswalk’ in publications use:

  Ari Lamstein (2026). _zctaCrosswalk: Crosswalk Between 2020 Census
  ZIP Code Tabulation Areas (ZCTAs), States and Counties_. R package
  version 2.0.1, <https://github.com/brendensm/zctacrosswalk>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {zctaCrosswalk: Crosswalk Between 2020 Census ZIP Code Tabulation Areas (ZCTAs),
States and Counties},
    author = {{Ari Lamstein}},
    year = {2026},
    note = {R package version 2.0.1},
    url = {https://github.com/brendensm/zctacrosswalk},
  }