@book{21149,
	author = {Shores, Elizabeth F. and Grace, Cathy},
	title = {El portafolio paso a paso},
	publisher = {Graó},
	year = {2004},
	series = {Biblioteca de infantil. Didáctica / Diseño y desarrollo curricular},
	address = {Barcelona},
	edition = {1ª ed.},
	note = {Contiene apéndices}
}