Cita APA (7th ed.)

The World Bank. (1999). World development indicators. World Bank.

Cita Chicago (17th ed.)

The World Bank. World Development Indicators. Washington, D.C.: World Bank, 1999.

Cita MLA (8th ed.)

The World Bank. World Development Indicators. World Bank, 1999.

Atenció: Aquestes cites poden no estar 100% correctes.