Cita APA

(2006). 2006: World development indicators. Washington, D.C: The World Bank.

Chicago Style Citation

2006: World Development Indicators. Washington, D.C: The World Bank, 2006.

Cita MLA

2006: World Development Indicators. Washington, D.C: The World Bank, 2006.

Atenció: Aquestes cites poden no estar 100% correctes.