Cita APA

The World Bank. (2009). World development indicators 2009. Washington DC: The World Bank.

Chicago Style Citation

The World Bank. World Development Indicators 2009. Washington DC: The World Bank, 2009.

Cita MLA

The World Bank. World Development Indicators 2009. Washington DC: The World Bank, 2009.

Atenció: Aquestes cites poden no estar 100% correctes.