@book{30137,
	author = {Sluckin, W.},
	title = {El aprendizaje temprano :},
	publisher = {Siglo Veintiuno,},
	year = {1979.},
	series = {Psicología y Etología / Armando Suárez},
	address = {México :},
	edition = {2a ed.}
}