Alexander, L. G. (1973). Practice and progress: An integrated course for pre-intermediate students. London: Longman.
शिकागो स्टाइल उद्धरणAlexander, L. G. Practice and Progress: An Integrated Course for Pre-intermediate Students. London: Longman, 1973.
एमएलए उद्धरणAlexander, L. G. Practice and Progress: An Integrated Course for Pre-intermediate Students. London: Longman, 1973.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.