To cite package ‘controller’ in publications use:

  Roe J (2026). _controller: Controlled Vocabularies_. R package
  version 0.1.0, <https://CRAN.R-project.org/package=controller>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {controller: Controlled Vocabularies},
    author = {Joe Roe},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=controller},
  }