To cite package ‘gtable’ in publications use:

  Wickham H, Pedersen T (2024). _gtable: Arrange 'Grobs' in Tables_. R
  package version 0.3.6, <https://CRAN.R-project.org/package=gtable>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gtable: Arrange 'Grobs' in Tables},
    author = {Hadley Wickham and Thomas Lin Pedersen},
    year = {2024},
    note = {R package version 0.3.6},
    url = {https://CRAN.R-project.org/package=gtable},
  }