To cite phyloch in a publication use:
Heibl C (2008 onwards). “PHYLOCH: R language tree plotting tools and interfaces to diverse phylogenetic software packages. http://www.christophheibl.de/Rpackages.html.”
As phyloch is evolving quickly, you may want to cite also its version number (found with 'library(help = phyloch)').
Corresponding BibTeX entry:
@Misc{, title = {PHYLOCH: R language tree plotting tools and interfaces to diverse phylogenetic software packages. http://www.christophheibl.de/Rpackages.html}, author = {C. Heibl}, year = {2008 onwards}, }