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. DOI 10.18637/jss.v035.i10 URL
  https://www.jstatsoft.org/v35/i10/.

A BibTeX entry for LaTeX users is

  @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},
    volume = {35},
    number = {10},
    pages = {1--27},
    doi = {10.18637/jss.v035.i10},
  }