International Monetary Fund. (1981). Direction of trade statistics. International Monetary Fund.
Citazione stile Chigago Style (17a edizione)International Monetary Fund. Direction of Trade Statistics. Washington, D.C.: International Monetary Fund, 1981.
Citatione MLA (8a ed.)International Monetary Fund. Direction of Trade Statistics. International Monetary Fund, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.