APA aipamena

Comfort, J., & Utley, D. (1996). Effective telephoning: Teacher's book. Oxford: Oxford University Press.

Chicago Style aipamena

Comfort, Jeremy., và Derek Utley. Effective Telephoning: Teacher's Book. Oxford: Oxford University Press, 1996.

MLA aipamena

Comfort, Jeremy., và Derek Utley. Effective Telephoning: Teacher's Book. Oxford: Oxford University Press, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.