World Bank, ebrary, Inc, & Raballand, G. (2012). Why does cargo spend weeks in Sub-Saharan African ports?: Lessons from six countries. World Bank.
芝加哥风格引文World Bank, Inc ebrary, 与 Gaël Raballand. Why Does Cargo Spend Weeks in Sub-Saharan African Ports?: Lessons from Six Countries. Washington, D.C.: World Bank, 2012.
MLA引文World Bank, et al. Why Does Cargo Spend Weeks in Sub-Saharan African Ports?: Lessons from Six Countries. World Bank, 2012.
警告：这些引文格式不一定是100％准确.