APA aipamena

O. Henry. (2008). The Ransom of red chief. Oxford: Oxford University Press.

Chicago Style aipamena

O. Henry. The Ransom of Red Chief. Oxford: Oxford University Press, 2008.

MLA aipamena

O. Henry. The Ransom of Red Chief. Oxford: Oxford University Press, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.