Comfort, J., & Utley, D. (1996). Effective telephoning: Teacher's book. Oxford: Oxford University Press.
استشهاد بنمط شيكاغوComfort, Jeremy., و Derek Utley. Effective Telephoning: Teacher's Book. Oxford: Oxford University Press, 1996.
MLA استشهادComfort, Jeremy., و Derek Utley. Effective Telephoning: Teacher's Book. Oxford: Oxford University Press, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.