To cite package ‘once’ in publications use:

McDonald G (2022). once: Execute Expensive Operations Only Once. R package version 0.4.1, https://github.com/gdmcdonald/once.

Corresponding BibTeX entry:

  @Manual{,
    title = {once: Execute Expensive Operations Only Once},
    author = {Gordon McDonald},
    year = {2022},
    note = {R package version 0.4.1},
    url = {https://github.com/gdmcdonald/once},
  }