@book{60404,
	author = {Van Dalen, Deobold B., and Meyer, William J. },
	title = {Understanding educational research :},
	publisher = {McGraw-Hill,},
	year = {c1962.},
	series = {McGraw-Hill series in education. Psychology and human development in education},
	address = {New York :},
	note = {Includes index. }
}