@book{22330,
	author = {Ciceron, Marco Tulio. and Peñalosa, Joaquín Antonio},
	title = {Los oficios o los deberes  },
	publisher = {Porrúa },
	year = {2004.},
	series = {Sepan cuantos ; },
	address = {México },
	edition = {11a ed.},
	note = {Incluye índice}
}