@book{1714,
	author = {Childress, Robert L. and Gorsky, Robin D.},
	title = {Mathematics for Managerial Decisions /},
	publisher = {Prentice Hall,},
	year = {c 1989.},
	address = {Englewood Cliffs :},
	edition = {2nd ed.},
	note = {Includes index.}
}