@book{56299,
	author = {Green, Paul E and Tull, Donald S},
	title = {Research for marketing decisions},
	publisher = {Prentice-Hall},
	year = {1975.},
	series = {Prentice-Hall international series in management},
	address = {Englewood Cliffs, N.J. :},
	edition = {3rd ed.},
	note = {Bibliography.}
}