@book{7639,
	author = {Johnson, David W},
	title = {Aprender juntos y solos.},
	publisher = {Aique,},
	year = {1999.},
	series = {Carrera docente. Red Federal de Formación Continua},
	address = {Buenos Aires :},
	edition = {1a ed.},
	note = {p.307.}
}