@book{19383,
	author = {Larson, Ron,},
	title = {Precalculus :},
	publisher = {Brooks/Cole, Cengage Learning,},
	year = {c2012.},
	address = {Belmont, CA :},
	edition = {6th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy1303/2010937948-b.html}
}