@book{4658,
	author = {Barnett, Raymond A. and Ziegler, Michael R.},
	title = {Precalculus :},
	publisher = {McGraw-Hill,},
	year = {2005},
	address = {Boston :},
	note = {Includes indexes.},
	url = {http://www.loc.gov/catdir/description/mh023/99049637.html}
}