@book{61559,
	author = {Green, Paul E. and Tull, Donald S.,},
	title = {Research for marketing decisions /},
	publisher = {Prentice-Hall,},
	year = {1973.},
	series = {Prentice-Hall international series in management},
	address = {New delhi :},
	edition = {2d ed.},
	note = {Includes index}
}