@book{559,
	author = {Ayala de la Peñna, Amalia},
	title = {Técnicas de trabajo individual y de grupo en el aula :},
	publisher = {Pirámide,},
	year = {1997.},
	series = {Ojos solares. Desarrollo},
	address = {Madrid :},
	edition = {1a. ed.}
}