APA (7th ed.) Zitazioa
Metcalf, A. A. (2010). OK: The improbable story of America's greatest word. Oxford University Press.
Chicago Style (17th ed.) Zitazioa
Metcalf, Allan A. OK: The Improbable Story of America's Greatest Word. Oxford ; New York: Oxford University Press, 2010.
MLA (9th ed.) Zitazioa
Metcalf, Allan A. OK: The Improbable Story of America's Greatest Word. Oxford University Press, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.