To cite package 'mvMORPH' in publications use:

  Clavel, J., Escarguel, G., and Merceron, G. (2015) mvMORPH: an R
  package for fitting multivariate evolutionary models to morphometric
  data. Methods in Ecology and Evolution, 6(11):1311-1319. doi:
  10.1111/2041-210X.12420

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Julien Clavel and Gilles Escarguel and Gildas Merceron},
    title = {mvMORPH: an R package for fitting multivariate evolutionary models to morphometric data},
    year = {2015},
    journal = {Methods in Ecology and Evolution},
    volume = {6},
    pages = {1311-1319},
  }