To cite package ‘gdtools’ in publications use:

  Gohel D, Wickham H, Henry L, Ooms J (2026). _gdtools: Font Metrics
  and Font Management Utilities for R Graphics_. R package version
  0.5.2, <https://github.com/davidgohel/gdtools>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gdtools: Font Metrics and Font Management Utilities for R Graphics},
    author = {David Gohel and Hadley Wickham and Lionel Henry and Jeroen Ooms},
    year = {2026},
    note = {R package version 0.5.2},
    url = {https://github.com/davidgohel/gdtools},
  }
