Fraenkel, J. R. (1973). Helping students think and value: Strategies for teaching the social studies. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFraenkel, Jack R. Helping Students Think and Value: Strategies for Teaching the Social Studies. Englewood Cliffs, N.J., Manila: Prentice-Hall, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFraenkel, Jack R. Helping Students Think and Value: Strategies for Teaching the Social Studies. Prentice-Hall, 1973.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.