To cite package ‘mappings’ in publications use:

  Rich B (2024). _mappings: Functions for Transforming Categorical
  Variables_. R package version 1.0.0,
  <https://github.com/benjaminrich/mappings>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mappings: Functions for Transforming Categorical Variables},
    author = {Benjamin Rich},
    year = {2024},
    note = {R package version 1.0.0},
    url = {https://github.com/benjaminrich/mappings},
  }