@book{210851,
	author = {O'Shea, Mark. and Halliday, Tim.},
	title = {La gran enciclopedia de los anfibios y reptiles},
	publisher = {Editorial LIBSA.},
	year = {c2007.},
	address = {Madrid},
	url = {http://www.loc.gov/catdir/enhancements/fy0721/00045189-b.html}
}