APA aipamena

The World Bank. (2007). World developmet indicators 2007. Washington, D.C: The World Bank.

Chicago Style aipamena

The World Bank. World Developmet Indicators 2007. Washington, D.C: The World Bank, 2007.

MLA aipamena

The World Bank. World Developmet Indicators 2007. Washington, D.C: The World Bank, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.