To cite package ‘ggpage’ in publications use:

  Hvitfeldt E (2024). _ggpage: Creates Page Layout Visualizations_. R
  package version 0.2.3.9000,
  <https://github.com/emilhvitfeldt/ggpage>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ggpage: Creates Page Layout Visualizations},
    author = {Emil Hvitfeldt},
    year = {2024},
    note = {R package version 0.2.3.9000},
    url = {https://github.com/emilhvitfeldt/ggpage},
  }