@book{87549,
	author = {Cicero, Marcus Tullius,},
	title = {De los deberes},
	publisher = {Univ. Nacional Autónoma de México},
	year = {1962.},
	series = {Obras},
	address = {[México]},
	edition = {[2. ed.]},
	note = {Bibliotheca scriptorum Graecorum et Romanorum Maxicana.}
}