Cambridge University Press. (2011). Cambridge Key English Test 1: Examination Papers from University of Cambridge ESOL Examinations english for sprakers of other languages. Vietnam: Fahasa.
शिकागो स्टाइल उद्धरणCambridge University Press. Cambridge Key English Test 1: Examination Papers From University of Cambridge ESOL Examinations English for Sprakers of Other Languages. Vietnam: Fahasa, 2011.
एमएलए उद्धरणCambridge University Press. Cambridge Key English Test 1: Examination Papers From University of Cambridge ESOL Examinations English for Sprakers of Other Languages. Vietnam: Fahasa, 2011.
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