Gartrell, D., & Gartrell, D. ß. G. a. t. d. (1997). A guidance approach for the encouraging classroom (2nd ed.). Delmar Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGartrell, Daniel, और Daniel. ßt Guidance approach to discipline Gartrell. A Guidance Approach for the Encouraging Classroom. 2nd ed. Albany, N.Y: Delmar Publishers, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGartrell, Daniel, और Daniel. ßt Guidance approach to discipline Gartrell. A Guidance Approach for the Encouraging Classroom. 2nd ed. Delmar Publishers, 1997.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.