International Monetary Fund. Statistics Dept. (2011). Direction of Trade Statistics Quarterly, September 2011. International Monetary Fund.
Dyfyniad Arddull ChicagoInternational Monetary Fund. Statistics Dept. Direction of Trade Statistics Quarterly, September 2011. Washington, D.C.: International Monetary Fund, 2011.
Dyfyniad MLAInternational Monetary Fund. Statistics Dept. Direction of Trade Statistics Quarterly, September 2011. International Monetary Fund, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.