Cryer, D., Harms, T., & Ray, A. R. (1996). Active learning for fours. Innovative Learning Publications, Addison-Wesley Publishing Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCryer, Debby, Thelma Harms, और Adele Richardson Ray. Active Learning for Fours. Menlo Park, Calif.: Innovative Learning Publications, Addison-Wesley Publishing Co., 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCryer, Debby, et al. Active Learning for Fours. Innovative Learning Publications, Addison-Wesley Publishing Co., 1996.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.