International Monetary Fund. Statistics Dept. (2013). Direction of Trade Statistics Quarterly, March 2013. International Monetary Fund.
Cita Chicago (17th ed.)International Monetary Fund. Statistics Dept. Direction of Trade Statistics Quarterly, March 2013. Washington, D.C.: International Monetary Fund, 2013.
Cita MLA (8th ed.)International Monetary Fund. Statistics Dept. Direction of Trade Statistics Quarterly, March 2013. International Monetary Fund, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.