@book{67718,
	author = {Nisbet, John Donald. and Entwistle, Noel James,},
	title = {Métodos de investigación educativa},
	publisher = {Oikos-tau},
	year = {1980.},
	series = {Colección Ciencia de la Educación},
	address = {Barcelona},
	note = {Translation of : Educational research methods.}
}