@book{6837,
	author = {Marti i Garbayo, Mónica and Sanz Muelas, Isabel},
	title = {Números y formas},
	publisher = {Parramón},
	year = {2005},
	series = {Manitas artísticas},
	address = {Barcelona},
	edition = {Tercera edición},
	note = {Incluye plantillas}
}