APA (7th ed.) Zitazioa
World Bank & ebrary, Inc. (2008). Environmental sustainability: An evaluation of World Bank Group support. World Bank.
Chicago Style (17th ed.) Zitazioa
World Bank eta Inc ebrary. Environmental Sustainability: An Evaluation of World Bank Group Support. Washington, DC: World Bank, 2008.
MLA (9th ed.) Zitazioa
World Bank eta Inc ebrary. Environmental Sustainability: An Evaluation of World Bank Group Support. World Bank, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.