World Bank. (2009). Global economic prospects: Commodities at the crossroads. World Bank.
芝加哥风格引文World Bank. Global Economic Prospects: Commodities at the Crossroads. Washington, DC: World Bank, 2009.
MLA引文World Bank. Global Economic Prospects: Commodities at the Crossroads. World Bank, 2009.
警告：这些引文格式不一定是100％准确.