Cita APA (7th ed.)

Naterop, B. J., & Revell, R. (1997). Telephoning in English (2nd ed.). Cambridge University Press.

Cita Chicago (17th ed.)

Naterop, B. Jean, i Rod Revell. Telephoning in English. 2nd ed. Cambridge, UK ; New York: Cambridge University Press, 1997.

Cita MLA (8th ed.)

Naterop, B. Jean, i Rod Revell. Telephoning in English. 2nd ed. Cambridge University Press, 1997.