To cite package 'mclust' in publications use:

Chris Fraley, Adrian E. Raftery, T. Brendan Murphy, and Luca Scrucca (2012) mclust Version 4 for R: Normal Mixture Modeling for Model-Based Clustering, Classification, and Density Estimation Technical Report No. 597, Department of Statistics, University of Washington

Chris Fraley and Adrian E. Raftery (2002) Model-based Clustering, Discriminant Analysis and Density Estimation Journal of the American Statistical Association 97:611-631

Corresponding BibTeX entries:

  @Manual{,
    title = {mclust Version 4 for R: Normal Mixture Modeling for
      Model-Based Clustering, Classification, and Density Estimation},
    author = {Chris Fraley and Adrian E. Raftery and Thomas Brendan
      Murphy and Luca Scrucca},
    year = {2012},
    type = {Technical Report},
    number = {597},
    institution = {Department of Statistics, University of Washington},
  }
  @Article{,
    title = {Model-based Clustering, Discriminant Analysis and Density
      Estimation},
    author = {Chris Fraley and Adrian E. Raftery},
    year = {2002},
    journal = {Journal of the American Statistical Association},
    volume = {97},
    pages = {611-631},
  }