Turk, C. (2003). Effective speaking: Communicating in speech. Spun Press.
Chicago Style aipamenaTurk, Christopher. Effective Speaking: Communicating in Speech. London: Spun Press, 2003.
MLA aipamenaTurk, Christopher. Effective Speaking: Communicating in Speech. Spun Press, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.