@book{22128,
	author = {Spinoza, Benedictus de, and Larroyo, Francisco, 1908-},
	title = {Ética },
	publisher = {Porrúa },
	year = {1999.},
	series = {Sepan cuantos ; },
	address = {México },
	edition = {7a ed.},
	note = {Incluye índice}
}