To cite package ‘ggdiagram’ in publications use:

  Schneider W (2025). _ggdiagram: Object-Oriented Diagram Plots with
  ggplot2_. R package version 0.0.0.9000, ,
  <https://github.com/wjschne/ggdiagram>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ggdiagram: Object-Oriented Diagram Plots with ggplot2},
    author = {W. Joel Schneider},
    year = {2025},
    note = {R package version 0.0.0.9000, 
},
    url = {https://github.com/wjschne/ggdiagram},
  }