Richards, J. C. (1993). English for International Communication: Workbook ( Interchange). Cambridge: Cambridge University.
शिकागो स्टाइल उद्धरणRichards, Jack C. English for International Communication: Workbook ( Interchange). Cambridge: Cambridge University, 1993.
एमएलए उद्धरणRichards, Jack C. English for International Communication: Workbook ( Interchange). Cambridge: Cambridge University, 1993.
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