To cite randtoolbox in publications use:

C. Dutang and P. Savicky (2013), randtoolbox: Generating and Testing Random Numbers.

Corresponding BibTeX entry:

  @Manual{,
    title = {randtoolbox: Generating and Testing Random Numbers},
    author = {Christophe Dutang and Petr Savicky},
    year = {2013},
    note = {R package version 1.13},
  }