@book{305,
	author = {Blitzer,Robert},
	title = {Precalculus :},
	publisher = {Pearson education Inc,},
	year = {c2001.},
	address = {New Jersey:},
	note = {Includes index,questions and answers and appendix},
	url = {http://www.loc.gov/catdir/description/mh031/2002512225.html}
}