To cite package ‘rtf’ in publications use:

  Schaffer ME (2026). _rtf: Rich Text Format ('RTF') Output_. R package
  version 0.4-15, <https://CRAN.R-project.org/package=rtf>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rtf: Rich Text Format ('RTF') Output},
    author = {Michael E. Schaffer},
    year = {2026},
    note = {R package version 0.4-15},
    url = {https://CRAN.R-project.org/package=rtf},
  }