To cite the skewtools package in publications use:

Contreras-Reyes J. (2012). R package 'skewtools': Tools for analyze Skew-Elliptical distributions and related models (version 0.1.1). URL http://cran.r-project.org/web/packages/skewtools

Corresponding BibTeX entry:

  @Manual{,
    title = {{R} package \texttt{skewtools}: Tools for analyze
      Skew-Elliptical distributions and related models (version
      0.1.1)},
    author = {J. Contreras-Reyes},
    address = {Instituto de Fomento Pesquero, Valparaiso, Chile},
    year = {2012},
    url = {http://cran.r-project.org/web/packages/skewtools},
  }