@book{20954,
	author = {Van Dalen, Deobold B., and Meyer, William J.},
	title = {Manual de técnica de la investigación educacional /},
	publisher = {Paidos },
	year = {1983.},
	series = {Paidós educador.},
	address = {Méxicio },
	note = {Traducción de: Understanding educational research.}
}