World Bank. (2005). World Development Indicators 2005. World Bank.
Cita Chicago (17th ed.)World Bank. World Development Indicators 2005. Washington, D.C.: World Bank, 2005.
Cita MLA (8th ed.)World Bank. World Development Indicators 2005. World Bank, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.