To cite tableExtra in publications use:

Pradat Y (2021). tableExtra: An R package for creating publication-ready extra heatmap plots.. R package version 1.0.0, https://github.com/ypradat/tableExtra.

Corresponding BibTeX entry:

  @Manual{,
    title = {tableExtra: An R package for creating publication-ready
      extra heatmap plots.},
    author = {Yoann Pradat},
    year = {2021},
    note = {R package version 1.0.0},
    url = {https://github.com/ypradat/tableExtra},
  }