Ellsworth, P. T. (1938). International economics. New York: The MacMillan Company.
Dyfyniad Arddull ChicagoEllsworth, P. T. International Economics. New York: The MacMillan Company, 1938.
Dyfyniad MLAEllsworth, P. T. International Economics. New York: The MacMillan Company, 1938.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.