Richards, J. C. (1998). New interchange: English for international communication : Teacher's edition. Cambridge: Cambridge University Press.
शिकागो स्टाइल उद्धरणRichards, Jack C. New Interchange: English for International Communication : Teacher's Edition. Cambridge: Cambridge University Press, 1998.
एमएलए उद्धरणRichards, Jack C. New Interchange: English for International Communication : Teacher's Edition. Cambridge: Cambridge University Press, 1998.
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