To cite package ‘ggbiplot’ in publications use:

Vu VQ, Friendly M (2025). ggbiplot: A Grammar of Graphics Implementation of Biplots. R package version 0.6.5, https://github.com/friendly/ggbiplot.

Corresponding BibTeX entry:

  @Manual{,
    title = {ggbiplot: A Grammar of Graphics Implementation of
      Biplots},
    author = {Vincent Q. Vu and Michael Friendly},
    year = {2025},
    note = {R package version 0.6.5},
    url = {https://github.com/friendly/ggbiplot},
  }