To cite package ‘trigd’ in publications use:

  McDermott G (2026). _trigd: Three-Layer Graphics Device_. R package
  version 0.0.1, <https://github.com/eitsupi/trigd>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {trigd: Three-Layer Graphics Device},
    author = {Grant McDermott},
    year = {2026},
    note = {R package version 0.0.1},
    url = {https://github.com/eitsupi/trigd},
  }