APA aipamena

The World Bank. (2004). World development indicators 2004. Washington, D. C: The World Bank.

Chicago Style aipamena

The World Bank. World Development Indicators 2004. Washington, D. C: The World Bank, 2004.

MLA aipamena

The World Bank. World Development Indicators 2004. Washington, D. C: The World Bank, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.