To cite npmv in publications use:

  Woodrow W. Burchett, Amanda R. Ellis, Solomon W. Harrar, Arne C.
  Bathke (2017). Nonparametric Inference for Multivariate Data: The R
  Package npmv. Journal of Statistical Software, 76(4), 1-18.
  doi:10.18637/jss.v076.i04

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Nonparametric Inference for Multivariate Data: The {R} Package {npmv}},
    author = {Woodrow W. Burchett and Amanda R. Ellis and Solomon W. Harrar and Arne C. Bathke},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {76},
    number = {4},
    pages = {1--18},
    doi = {10.18637/jss.v076.i04},
  }
