To cite R/qtlDesign in publications use:

Sen et al. (2007) R/qtlDesign: Inbred line cross experimental design. Mammalian Genome 18:87-93

Corresponding BibTeX entry:

  @Article{,
    title = {R/qtlDesign: Inbred line cross experimental design},
    author = {Saunak Sen and Jaya M. Satagopan and Karl W. Broman and
      Gary A. Churchill},
    journal = {Mammalian Genome},
    year = {2007},
    volume = {18},
    pages = {87-93},
  }