APA (7th ed.) Zitazioa

World Bank & ebrary, Inc. (2009). World Development Indicators. World Bank Publications.

Chicago Style (17th ed.) Zitazioa

World Bank eta Inc ebrary. World Development Indicators. Washington: World Bank Publications, 2009.

MLA (9th ed.) Zitazioa

World Bank eta Inc ebrary. World Development Indicators. World Bank Publications, 2009.