World Bank & World Bank. International Economics Dept. Development Data Group. (2009). World development indicators 2009. The World Bank.
Citazione stile Chigago Style (17a edizione)World Bank e World Bank. International Economics Dept. Development Data Group. World Development Indicators 2009. Washington, D.C: The World Bank, 2009.
Citatione MLA (9a ed.)World Bank e World Bank. International Economics Dept. Development Data Group. World Development Indicators 2009. The World Bank, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.