APA (7th ed.) Zitazioa
Harwood, H. H. (2003). Invisible giants: The empires of Cleveland's Van Sweringen brothers. Indiana University Press.
Chicago Style (17th ed.) Zitazioa
Harwood, Herbert H. Invisible Giants: The Empires of Cleveland's Van Sweringen Brothers. Bloomington and Indianapolis: Indiana University Press, 2003.
MLA (9th ed.) Zitazioa
Harwood, Herbert H. Invisible Giants: The Empires of Cleveland's Van Sweringen Brothers. Indiana University Press, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.