Cita APA

Comfort, J., & Utley, D. (1996). Effective telephoning: Teacher's book. Oxford: Oxford University Press.

Citación estilo Chicago

Comfort, Jeremy., y Derek Utley. Effective Telephoning: Teacher's Book. Oxford: Oxford University Press, 1996.

Cita MLA

Comfort, Jeremy., y Derek Utley. Effective Telephoning: Teacher's Book. Oxford: Oxford University Press, 1996.