@book{6709,
	author = {Barnett, Raymond A. and Ziegler, Michael R.},
	title = {College algebra with trigonometry.},
	publisher = {WCB/McGraw-Hill,},
	year = {c1999.},
	address = {Boston, Mass. :},
	edition = {6th ed. /},
	note = {Includes indexes.}
}