To cite package ‘retroharmonize’ in publications use:

  Antal D (2023). _retroharmonize: Ex Post Survey Data Harmonization_.
  R package version 0.2.5.003,
  <https://github.com/ropengov/retroharmonize>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {retroharmonize: Ex Post Survey Data Harmonization},
    author = {Daniel Antal},
    year = {2023},
    note = {R package version 0.2.5.003},
    url = {https://github.com/ropengov/retroharmonize},
  }