World Bank. (1989). Price prospects for major primary commodities, 1988-2000. World Bank.
Chicagoスタイル(17版)引用形式World Bank. Price Prospects for Major Primary Commodities, 1988-2000. Washington, D.C.: World Bank, 1989.
MLA(8版)引用形式World Bank. Price Prospects for Major Primary Commodities, 1988-2000. World Bank, 1989.
警告: この引用は必ずしも正確ではありません.