Crowther, I. (2007). Creating effective learning environments (2nd ed.). Thomson/Nelson.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCrowther, Ingrid. Creating Effective Learning Environments. 2nd ed. Toronto, Ont: Thomson/Nelson, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCrowther, Ingrid. Creating Effective Learning Environments. 2nd ed. Thomson/Nelson, 2007.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.