To cite package ‘zippeR’ in publications use:

Prener C, Wiemken T, Cook A (2026). zippeR: Working with United States ZIP Code and ZIP Code Tabulation Area Data. R package version 0.2.0, https://github.com/pfizer-opensource/zipper.

Corresponding BibTeX entry:

  @Manual{,
    title = {zippeR: Working with United States ZIP Code and ZIP Code
      Tabulation Area Data},
    author = {Christopher Prener and Timothy Wiemken and Angela Cook},
    year = {2026},
    note = {R package version 0.2.0},
    url = {https://github.com/pfizer-opensource/zipper},
  }