@book{80849,
	author = {Stewart, James and Redlin, L.},
	title = {Precalculus :},
	publisher = {Brooks/Cole, Cengage Learning,},
	year = {c2012},
	address = {Belmont, CA :},
	edition = {6th ed.},
	note = {Includes index},
	url = {http://catdir.loc.gov/catdir/enhancements/fy1211/2010935410-t.html}
}