Cita APA (7th ed.)
World Bank. (2013). World development indicators 2013. World Bank.
Cita Chicago (17th ed.)
World Bank. World Development Indicators 2013. Washington, DC: World Bank, 2013.
Cita MLA (9th ed.)
World Bank. World Development Indicators 2013. World Bank, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.