@book{11606,
	author = {Purves, William K. and Sadava, David.},
	title = {Life:},
	publisher = {Sinauer Associates ;},
	year = {2003.},
	address = {Sunderland, Mass. :},
	edition = {7th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0410/2003022294.html}
}