To cite package ‘sdf’ in publications use:

  Parry J (2024). _sdf: What the Package Does (One Line, Title Case)_.
  R package version 0.0.0.9000, <https://github.com/josiahparry/sdf>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {sdf: What the Package Does (One Line, Title Case)},
    author = {Josiah Parry},
    year = {2024},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/josiahparry/sdf},
  }