To cite package ‘ggnewscale’ in publications use:

Campitelli E (2026). ggnewscale: Multiple Fill and Colour Scales in 'ggplot2'. R package version 0.5.2.9000, https://eliocamp.github.io/ggnewscale/.

Corresponding BibTeX entry:

  @Manual{,
    title = {ggnewscale: Multiple Fill and Colour Scales in 'ggplot2'},
    author = {Elio Campitelli},
    year = {2026},
    note = {R package version 0.5.2.9000},
    url = {https://eliocamp.github.io/ggnewscale/},
  }