@book{36397,
	author = {Cohen, Louis. and Agudo López, Francisco,},
	title = {Métodos de investigación educativa /},
	publisher = {La Muralla },
	year = {1990.},
	series = {Colección Aula Abierta.},
	address = {Madrid },
	note = {Título original: Research Methods in Education.}
}