@book{227083,
	author = {Gutiérrez Martínez, Francisco. and e-libro, Corp.},
	title = {Teorías del desarrollo cognitivo},
	publisher = {McGraw-Hill/Interamericana de España},
	year = {[2005]},
	address = {Madrid [etc.]},
	url = {http://site.ebrary.com/lib/pucpr/Doc?id=10498395}
}