To cite randtoolbox in publications use:

Christophe D, Petr S (2021). randtoolbox: Generating and Testing Random Numbers. R package version 1.31.1.

Corresponding BibTeX entry:

  @Manual{,
    title = {randtoolbox: Generating and Testing Random Numbers},
    author = {Dutang Christophe and Savicky Petr},
    year = {2021},
    note = {R package version 1.31.1},
  }