To cite package ‘vowels’ in publications use:

  Kendall T, Thomas ER (2026). _vowels: Vowel Manipulation,
  Normalization, and Plotting_. R package version 1.2-3,
  <https://CRAN.R-project.org/package=vowels>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {vowels: Vowel Manipulation, Normalization, and Plotting},
    author = {Tyler Kendall and Erik R. Thomas},
    year = {2026},
    note = {R package version 1.2-3},
    url = {https://CRAN.R-project.org/package=vowels},
  }
