@book{30483,
	author = {Barnett, Raymond A.},
	title = {Precalculus /},
	publisher = {McGraw-Hill,},
	year = {c2011.},
	series = {Barnett, Ziegler & Byleen's, and Sobecki precalculus series.},
	address = {Dubuque, IA :},
	edition = {7th ed.},
	note = {Includes index.}
}