Richards, J. C. (1994). Interchange: English for international communication : Student's book. Đà Nẵng: Nxb. Đà Nẵng.
शिकागो स्टाइल उद्धरणRichards, Jack C. Interchange: English for International Communication : Student's Book. Đà Nẵng: Nxb. Đà Nẵng, 1994.
एमएलए उद्धरणRichards, Jack C. Interchange: English for International Communication : Student's Book. Đà Nẵng: Nxb. Đà Nẵng, 1994.
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