@book{27229,
	author = {Piaget, Jean},
	title = {Seis estudios de psicología.},
	publisher = {Ariel,},
	year = {1993.},
	address = {Barcelona :},
	note = {Inv. 3131 Ej. 1 reemp. Inv. 151 Ej. 8.}
}