@book{201156,
	author = {Brusca, Richard C. and Brusca, Gary J.},
	title = {Invertebrados},
	publisher = {McGraw-Hill/Interamericana},
	year = {c2005.},
	address = {Madrid},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/toc/fy038/2002154089.html}
}