Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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