To cite package ‘psgc’ in publications use:

  Abdulsamad B (2026). _psgc: Philippine Standard Geographic Code_. R
  package version 0.1.0, <https://CRAN.R-project.org/package=psgc>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {psgc: Philippine Standard Geographic Code},
    author = {Bhas Abdulsamad},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=psgc},
  }