To cite package ‘ggExtra’ in publications use:

Attali D, Baker C (2025). ggExtra: Add Marginal Histograms to 'ggplot2', and More 'ggplot2' Enhancements. R package version 0.11.0.9000, https://github.com/daattali/ggextra.

Corresponding BibTeX entry:

  @Manual{,
    title = {ggExtra: Add Marginal Histograms to 'ggplot2', and More
      'ggplot2' Enhancements},
    author = {Dean Attali and Christopher Baker},
    year = {2025},
    note = {R package version 0.11.0.9000},
    url = {https://github.com/daattali/ggextra},
  }