Cratty, B. J. (1971). Active learning: Games to enhance academic abilities. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCratty, Bryant J. Active Learning: Games to Enhance Academic Abilities. Englewood Cliffs, N. J: Prentice-Hall, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCratty, Bryant J. Active Learning: Games to Enhance Academic Abilities. Prentice-Hall, 1971.
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