Oxenden, C. (1996). English file: Listen and speak. Oxford: Oxford University Press.
Chicago Style aipamenaOxenden, Clive. English File: Listen and Speak. Oxford: Oxford University Press, 1996.
MLA aipamenaOxenden, Clive. English File: Listen and Speak. Oxford: Oxford University Press, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.