The World Bank. (2009). The little data book 2009. Washington, D.C: The World Bank.
Trích dẫn kiểu ChicagoThe World Bank. The Little Data Book 2009. Washington, D.C: The World Bank, 2009.
MLA引文The World Bank. The Little Data Book 2009. Washington, D.C: The World Bank, 2009.
警告：这些引文格式不一定是100％准确.