To cite package ‘rollup’ in publications use:

Ahn J (2025). rollup: A Tidy Grouping Set Aggregation. R package version 0.2.2, https://github.com/juyoungahn/rollup.

Corresponding BibTeX entry:

  @Manual{,
    title = {rollup: A Tidy Grouping Set Aggregation},
    author = {Ju Young Ahn},
    year = {2025},
    note = {R package version 0.2.2},
    url = {https://github.com/juyoungahn/rollup},
  }