To cite package ‘productplots’ in publications use:

  Wickham H, Hofmann H (2024). _productplots: Product Plots for R_. R
  package version 0.1.2, <https://github.com/hadley/productplots>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {productplots: Product Plots for R},
    author = {Hadley Wickham and Heike Hofmann},
    year = {2024},
    note = {R package version 0.1.2},
    url = {https://github.com/hadley/productplots},
  }