To cite package ‘ISOcodes’ in publications use:

  Buchta C, Hornik K (2024). _ISOcodes: Selected ISO Codes_. R package
  version 2024.02.12, <https://CRAN.R-project.org/package=ISOcodes>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ISOcodes: Selected ISO Codes},
    author = {Christian Buchta and Kurt Hornik},
    year = {2024},
    note = {R package version 2024.02.12},
    url = {https://CRAN.R-project.org/package=ISOcodes},
  }