APA (7th ed.) Zitazioa

the World Bank. (2008). Doing Business 2008. World Bank Group.

Chicago Style (17th ed.) Zitazioa

the World Bank. Doing Business 2008. Washington: World Bank Group, 2008.

MLA (9th ed.) Zitazioa

the World Bank. Doing Business 2008. World Bank Group, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.