@book{89641,
	author = {Baltes, Paul B. and Reese, Hayne Waring},
	title = {Métodos de investigación en psicología evolutiva},
	publisher = {Morata},
	year = {1981.},
	series = {Colección Psicología. Psicología del desarrollo},
	address = {Madrid},
	note = {Translation of: Life-span developmental psychology.}
}