APA (7th ed.) Zitazioa
ebrary, Inc, & O'Hanlon, M. E. (2007). Opportunity 08: Independent ideas for America's next president. Brookings Institution Press.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, eta Michael E. O'Hanlon. Opportunity 08: Independent Ideas for America's Next President. Washington, D.C.: Brookings Institution Press, 2007.
MLA (9th ed.) Zitazioa
ebrary, Inc, eta Michael E. O'Hanlon. Opportunity 08: Independent Ideas for America's Next President. Brookings Institution Press, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.