To cite package ‘popmex’ in publications use:

  Dzul Manzanilla F, Cruz López C, Morales García E (2026). _popmex:
  Population Density Mexico_. R package version 0.1.0,
  <https://github.com/fdzul/popmex>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {popmex: Population Density Mexico},
    author = {Felipe Antonio {Dzul Manzanilla} and Cecilia {Cruz López} and Emmanuel {Morales García}},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/fdzul/popmex},
  }