To cite package ‘NB.MClust’ in publications use:

  Li Q (2017). _NB.MClust: Negative Binomial Model-Based Clustering_. R
  package version 1.1.1,
  <https://CRAN.R-project.org/package=NB.MClust>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {NB.MClust: Negative Binomial Model-Based Clustering},
    author = {Qian Li},
    year = {2017},
    note = {R package version 1.1.1},
    url = {https://CRAN.R-project.org/package=NB.MClust},
  }