@book{1586,
	author = {Barnett, Raymond A. and Ziegler, Michael R.},
	title = {Precalculus. /},
	publisher = {McGraw-Hill,},
	year = {c2008.},
	series = {Barnett, Ziegler & Byleen's precalculus series},
	address = {Boston :},
	edition = {6th ed.},
	note = {Includes indexes.},
	url = {http://www.loc.gov/catdir/toc/ecip072/2006033534.html}
}