Dyfyniad APA

International Monetary Fund. (1981). Direction of trade statistics. International Monetary Fund.

Dyfyniad Arddull Chicago

International Monetary Fund. Direction of Trade Statistics. Washington, D.C.: International Monetary Fund, 1981.

Dyfyniad MLA

International Monetary Fund. Direction of Trade Statistics. International Monetary Fund, 1981.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.