Richards, J., & Long, M. (1980). Breakthrough: A Course in English Communication Practice. Paris: Hermes*.
शिकागो स्टाइल उद्धरणRichards, J.c., और M.n Long. Breakthrough: A Course in English Communication Practice. Paris: Hermes*, 1980.
एमएलए उद्धरणRichards, J.c., और M.n Long. Breakthrough: A Course in English Communication Practice. Paris: Hermes*, 1980.
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