@book{33584,
	author = {Mendieta y Núñez, Lucio, and Editorial Porrúa.},
	title = {Las clases sociales /},
	publisher = {Editorial Porrúa },
	year = {1980.},
	series = {Colección Porrúa.},
	address = {México },
	edition = {4a ed.}
}