Choe, B. (1991). Global trends in raw materials consumption. International Economics Department, World Bank.
Cita Chicago (17th ed.)Choe, Boum-Jong. Global Trends in Raw Materials Consumption. [Washington, D.C.]: International Economics Department, World Bank, 1991.
Cita MLA (9th ed.)Choe, Boum-Jong. Global Trends in Raw Materials Consumption. International Economics Department, World Bank, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.