To cite package ‘zip’ in publications use:

  Csárdi G (2026). _zip: Cross-Platform 'zip' Compression_. R package
  version 3.0.0, <https://CRAN.R-project.org/package=zip>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {zip: Cross-Platform 'zip' Compression},
    author = {Gábor Csárdi},
    year = {2026},
    note = {R package version 3.0.0},
    url = {https://CRAN.R-project.org/package=zip},
  }