@book{68320,
	author = {María Herrera, Ángel and María Herrera, Ángel},
	title = {Propósito transformador masivo},
	publisher = {Bubok Publishing, },
	year = {[Fecha de publicación no identificada]},
	address = {[Madrid, España] :},
	url = {https://public.digitaliapublishing.com/a/132060}
}