To cite MissMech in publications use:

Mortaza Jamshidian, Siavash Jalal, Camden Jansen (2014). MissMech: An R Package for Testing Homoscedasticity, Multivariate Normality, and Missing Completely at Random (MCAR). Journal of Statistical Software, 56(6), 1-31. URL http://www.jstatsoft.org/v56/i06/.

Corresponding BibTeX entry:

  @Article{,
    title = {{MissMech}: An {R} Package for Testing Homoscedasticity,
      Multivariate Normality, and Missing Completely at Random (MCAR)},
    author = {Mortaza Jamshidian and Siavash Jalal and Camden Jansen},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {56},
    number = {6},
    pages = {1--31},
    url = {http://www.jstatsoft.org/v56/i06/},
  }