Παραπομπή APA

Naterop,, J. B., & Revell,, R. Telephoning in English- Audio CD 2 (3.). Cambridge University Press.

Παραπομπή Chicago Style

Naterop,, Jean B., και Rod Revell. Telephoning in English- Audio CD 2. 3. New York: Cambridge University Press.

Παραπομπή MLA

Naterop,, Jean B., και Rod Revell. Telephoning in English- Audio CD 2. 3. Cambridge University Press.