To cite the package 'DEMEtics' in publications use:

Gerlach, G., Jueterbock, A., Kraemer, P., Deppermann, J. and Harmand, P. (2010). Calculations of population differentiation based on G(ST) and D: forget G(ST) but not all of statistics! Molecular Ecology 19: 3845-3852.

Corresponding BibTeX entry:

    title = {Calculations of population differentiation based on
      $G_{ST}$ and $D$: forget $G_{ST}$ but not all of statistics!},
    journal = {Molecular Ecology},
    author = {Gabriele Gerlach and Alexander Jueterbock and Philipp
      Kraemer and Jana Deppermann and Peter Harmand},
    year = {2010},
    volume = {19},
    number = {18},
    pages = {3845--3852},
    publisher = {Blackwell Publishing Ltd},