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 citiranjeThe World Bank. The Little Data Book 2009. Washington, D.C: The World Bank, 2009.
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