@book{20744,
	author = {Levine, Samuel and Elzey, Freeman F.,},
	title = {A programmed introduction to research},
	publisher = {Wadsworth Pub. Co.},
	year = {c1976.},
	address = {Belmont, Calif.},
	edition = {Expanded 2d ed.},
	note = {Includes index.}
}