APA (7 वां संस्करण) प्रशस्ति पत्र
World Bank, ebrary, Inc, & Raballand, G. (2012). Why does cargo spend weeks in Sub-Saharan African ports?: Lessons from six countries. World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
World Bank, Inc ebrary, और Gaël Raballand. Why Does Cargo Spend Weeks in Sub-Saharan African Ports?: Lessons from Six Countries. Washington, D.C.: World Bank, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
World Bank, et al. Why Does Cargo Spend Weeks in Sub-Saharan African Ports?: Lessons from Six Countries. World Bank, 2012.
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