Cita APA (7a ed.)

Naterop, B. J., & Revell, R. (1994). Telephoning in english. Cambridge University.

Cita Chicago Style (17a ed.)

Naterop, B Jean, y Rod Revell. Telephoning in English. Cambridge: Cambridge University, 1994.

Cita MLA (8a ed.)

Naterop, B Jean, y Rod Revell. Telephoning in English. Cambridge University, 1994.