@book{19636,
	author = {Donald Voet  University of Pennsylvania and Judith G.Voet Swartmore College  and Charlotte W. Pratt Seattle Pacific University },
	title = {Principles of biochemistry },
	publisher = {John Wiley },
	year = {c2013},
	address = {USA},
	edition = {Fourth  edition.},
	url = {http://www.loc.gov/catdir/toc/ecip059/2005007745.html}
}