Wright, D. M. (1947). The economics of disturbance. Macmillan.
Dyfyniad Arddull ChicagoWright, David McCord. The Economics of Disturbance. New York: Macmillan, 1947.
Dyfyniad MLAWright, David McCord. The Economics of Disturbance. Macmillan, 1947.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.