To cite distrMod in publications use:

Matthias Kohl, Peter Ruckdeschel (2010). R Package distrMod: S4 Classes and Methods for Probability Models. Journal of Statistical Software, 35(10), 1-27. URL http://www.jstatsoft.org/v35/i10/.

Corresponding BibTeX entry:

  @Article{,
    title = {{R} Package {distrMod}: {S}4 Classes and Methods for
      Probability Models},
    author = {Matthias Kohl and Peter Ruckdeschel},
    journal = {Journal of Statistical Software},
    year = {2010},
    volume = {35},
    number = {10},
    pages = {1--27},
    url = {http://www.jstatsoft.org/v35/i10/},
  }