Libbish, B. e. (1964). Advances in the teaching of modern languages. Pergamon Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLibbish, B. ed. Advances in the Teaching of Modern Languages. Oxford: Pergamon Press, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLibbish, B. ed. Advances in the Teaching of Modern Languages. Pergamon Press, 1964.
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