@book{59239,
	author = {Mendieta y Núñez, Lucio and Sorokin, Pitirim A.,},
	title = {Las Clases sociales },
	publisher = {Porrua,},
	year = {1980.},
	address = {México :},
	edition = {4a ed.},
	note = {Incluye índice}
}