To cite the 'Rcmdr' package in publications use:

  Fox, J., and Bouchet-Valat, M. (2024). Rcmdr: R Commander. R package
  version 2.9-4.

A BibTeX entry for LaTeX users is

  @Manual{RcmdrManual,
    title = {{Rcmdr: R Commander}},
    author = {John Fox and Manuel Munoz Marquez and Milan Bouchet-Valat},
    year = {2024},
    note = {R package version 2.9-4},
    url = {https://github.com/RCmdr-Project/rcmdr},
  }

  Fox, J. (2017). Using the R Commander: A Point-and-Click Interface or
  R. Boca Raton FL: Chapman and Hall/CRC Press.

A BibTeX entry for LaTeX users is

  @Book{RcmdrBook,
    title = {Using the {R Commander}: A Point-and-Click Interface for {R}},
    author = {John Fox},
    year = {2017},
    publisher = {Chapman and Hall/CRC Press},
    address = {Boca Raton {FL}},
    url = {https://www.john-fox.ca/RCommander/index.html},
  }

  Fox, J. (2005). The R Commander: A Basic Statistics Graphical User
  Interface to R. Journal of Statistical Software, 14(9): 1--42.

A BibTeX entry for LaTeX users is

  @Article{RcmdrArticle,
    title = {The {R} {C}ommander: A Basic Statistics Graphical User Interface to {R}},
    author = {John Fox},
    year = {2005},
    journal = {Journal of Statistical Software},
    volume = {14},
    number = {9},
    pages = {1--42},
    url = {https://www.jstatsoft.org/article/view/v014i09},
  }