To cite package ‘dfexpand’ in publications use:

Painter J (2023). dfexpand: Automatically Expand Delimited Column Values into Multiple Binary Columns with 'dfexpand'. R package version 0.0.2, https://github.com/jlpainter/dfexpand.

Corresponding BibTeX entry:

  @Manual{,
    title = {dfexpand: Automatically Expand Delimited Column Values
      into Multiple Binary Columns with 'dfexpand'},
    author = {Jeffery Painter},
    year = {2023},
    note = {R package version 0.0.2},
    url = {https://github.com/jlpainter/dfexpand},
  }