International Monetary Fund. (1987). Primary Commodities: May 1987. International Monetary Fund.
Citazione stile Chigago Style (17a edizione)International Monetary Fund. Primary Commodities: May 1987. Washington, D.C.: International Monetary Fund, 1987.
Citatione MLA (8a ed.)International Monetary Fund. Primary Commodities: May 1987. International Monetary Fund, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.