@book{1979,
	author = {Slavin, Robert E. and Wald, Miguel,},
	title = {Aprendizaje cooperativo :},
	publisher = {Aique,},
	year = {1999.},
	series = {Carrera Docente},
	address = {Buenos Aires :},
	edition = {1ª ed.},
	note = {Incorpora bibliografía.}
}