To cite package ‘gridExtra’ in publications use:

  Auguie B (2025). _gridExtra: Miscellaneous Functions for "Grid"
  Graphics_. R package version 2.3,
  <https://github.com/baptiste/gridextra>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gridExtra: Miscellaneous Functions for "Grid" Graphics},
    author = {Baptiste Auguie},
    year = {2025},
    note = {R package version 2.3},
    url = {https://github.com/baptiste/gridextra},
  }