To cite rngWELL in publications use:

C. Dutang & Petr Savicky (2013), rngWELL: WELL generators.

Corresponding BibTeX entry:

  @Manual{,
    title = {rngWELL: WELL generators.},
    author = {Christophe Dutang and Petr Savicky and Diethelm Wuertz},
    year = {2013},
    note = {R package version 0.10-1},
  }