@book{14959,
	author = {Barnett, Raymond A. and Ziegler, Michael W.},
	title = {Calculus for business, economics, life sciences and  social sciences/},
	publisher = {Dellen Publishing Company,},
	year = {1990},
	address = {San Francisco :},
	edition = {4th ed.},
	note = {Includes index.}
}