To cite geokodigo in publications use:

  Ernest Guevarra (2024). geokodigo: An Interface to the Philippine
  Standard Geographic Codes R package version 0.0.0.9000 URL
  https://panukatan.io/geokodigo/

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {geokodigo: An Interface to the Philippine Standard Geographic Codes},
    author = {{Ernest Guevarra}},
    year = {2024},
    note = {R package version 0.0.0.9000},
    url = {https://panukatan.io/geokodigo/},
  }