To cite EMMIXcskew in publications use:

Lee SX and McLachlan GJ (2017). “EMMIXcskew: An R Package for the Fitting of a Mixture of Canonical Fundamental Skew $t$-Distributions.” Journal of Statistical Software, 83(3), pp. 1–32. doi: 10.18637/jss.v083.i03.

Corresponding BibTeX entry:

  @Article{,
    title = {{EMMIXcskew}: An {R} Package for the Fitting of a Mixture
      of Canonical Fundamental Skew $t$-Distributions},
    author = {Sharon X. Lee and Geoffrey J. McLachlan},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {83},
    number = {3},
    pages = {1--32},
    doi = {10.18637/jss.v083.i03},
  }