Fondo Monetario Internacional. (1981). Direction of trade statistics: Yearbook. International Monetary Fund.
Cita Chicago Style (17a ed.)Fondo Monetario Internacional. Direction of Trade Statistics: Yearbook. Washington: International Monetary Fund, 1981.
Cita MLA (9a ed.)Fondo Monetario Internacional. Direction of Trade Statistics: Yearbook. International Monetary Fund, 1981.
Precaución: Estas citas no son 100% exactas.