To cite package ‘gplots’ in publications use:

  Warnes G, Bolker B, Bonebakker L, Gentleman R, Huber W, Liaw A,
  Lumley T, Maechler M, Magnusson A, Moeller S, Schwartz M, Venables B,
  Galili T (2024). _gplots: Various R Programming Tools for Plotting
  Data_. R package version 3.2.0,
  <https://CRAN.R-project.org/package=gplots>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gplots: Various R Programming Tools for Plotting Data},
    author = {Gregory R. Warnes and Ben Bolker and Lodewijk Bonebakker and Robert Gentleman and Wolfgang Huber and Andy Liaw and Thomas Lumley and Martin Maechler and Arni Magnusson and Steffen Moeller and Marc Schwartz and Bill Venables and Tal Galili},
    year = {2024},
    note = {R package version 3.2.0},
    url = {https://CRAN.R-project.org/package=gplots},
  }