@book{12818,
	author = {Walberg, Herbert J. and Paik, Susan J.},
	title = {Prácticas eficaces /},
	publisher = {Cooperativa Editorial Magisterio,},
	year = {2002.},
	series = {Practicas educativas; },
	address = {Bogotá :},
	note = {Incluye bibliográfia}
}