To cite mokken in publications use:

L. Andries van der Ark (2007). Mokken Scale Analysis in R. Journal of Statistical Software, 20(11), 1-19. URL http://www.jstatsoft.org/v20/i11/.
L. Andries van der Ark (2012). New Developments in Mokken Scale Analysis in R. Journal of Statistical Software, 48(5), 1-27. URL http://www.jstatsoft.org/v48/i05/.

Corresponding BibTeX entries:

  @Article{,
    title = {Mokken Scale Analysis in {R}},
    author = {L. Andries {Van der Ark}},
    journal = {Journal of Statistical Software},
    year = {2007},
    volume = {20},
    number = {11},
    pages = {1--19},
    url = {http://www.jstatsoft.org/v20/i11/},
  }
  @Article{,
    title = {New Developments in Mokken Scale Analysis in {R}},
    author = {L. Andries {Van der Ark}},
    journal = {Journal of Statistical Software},
    year = {2012},
    volume = {48},
    number = {5},
    pages = {1--27},
    url = {http://www.jstatsoft.org/v48/i05/},
  }