Comfort, J., & Utley, D. (1996). Effective telephoning: Teacher's book. Oxford: Oxford University Press.
शिकागो स्टाइल उद्धरणComfort, Jeremy., और Derek Utley. Effective Telephoning: Teacher's Book. Oxford: Oxford University Press, 1996.
एमएलए उद्धरणComfort, Jeremy., और Derek Utley. Effective Telephoning: Teacher's Book. Oxford: Oxford University Press, 1996.
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