To cite package 'hmmm' in publications use:

Roberto Colombi, Sabrina Giordano, Manuela Cazzaro (2014). hmmm: An R Package for Hierarchical Multinomial Marginal Models. Journal of Statistical Software, 59(11), 1-25. URL http://www.jstatsoft.org/v59/i11/.

Corresponding BibTeX entry:

  @Article{,
    title = {{hmmm}: An {R} Package for Hierarchical Multinomial
      Marginal Models},
    author = {Roberto Colombi and Sabrina Giordano and Manuela
      Cazzaro},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {59},
    number = {11},
    pages = {1--25},
    url = {http://www.jstatsoft.org/v59/i11/},
  }