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Dyfyniad Arddull ChicagoHeller, H. Robert. International Monetary Economics. New Delhi: Prentice-Hall of India, 1977.
Dyfyniad MLAHeller, H. Robert. International Monetary Economics. Prentice-Hall of India, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.