@book{114480,
	author = {Howe, Leland W. and Howe, Mary Martha},
	title = {Cómo personalizar la educación},
	publisher = {Santillana},
	year = {1977.},
	series = {Aula XXI},
	address = {Madrid},
	note = {Translation of : Personalizing education: values clarification and beyond.}
}