@book{9264,
	author = {Cohen, Louis and Manion, Lawrence},
	title = {Métodos de investigación educativa},
	publisher = {La Muralla},
	year = {1990},
	series = {Aula abierta},
	address = {Madrid},
	note = {Lista de publicaciones periódicas abreviadas en el texto: p. 481-482}
}