To cite MVN in publications use:

  Korkmaz S, Goksuluk D, Zararsiz G. MVN: An R Package for Assessing
  Multivariate Normality. The R Journal. 2014; 6(2):151-162.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {MVN: An R Package for Assessing Multivariate Normality.},
    author = {Selcuk Korkmaz and Dincer Goksuluk and Gokmen Zararsiz},
    journal = {The R Journal},
    year = {2014},
    volume = {6},
    number = {2},
    pages = {151--162},
    url = {https://journal.r-project.org/articles/RJ-2014-031/RJ-2014-031.pdf},
  }