Horowitz, I. L. (1966). Three worlds of development: The theory and practice of international stratification. New York: Oxford University press.
Dyfyniad Arddull ChicagoHorowitz, Irving Louis. Three Worlds of Development: The Theory and Practice of International Stratification. New York: Oxford University press, 1966.
Dyfyniad MLAHorowitz, Irving Louis. Three Worlds of Development: The Theory and Practice of International Stratification. New York: Oxford University press, 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.