To cite package MLDS in publications use:

Knoblauch, K. & Maloney, L. T. (2008) MLDS : Maximum likelihood difference scaling in R, Journal of Statistical Software, 25, 1-26, http://www.jstatsoft.org/v25/i02/.

Corresponding BibTeX entry:

  @Article{,
    title = {{MLDS} : Maximum likelihood difference scaling in {R}},
    author = {K. Knoblauch and L. T. Maloney},
    journal = {Journal of Statistical Software},
    volume = {25},
    year = {2008},
    pages = {1--26},
    url = {http://www.jstatsoft.org/v25/i02/},
  }