Higgins, J. L., & Sachs, L. A. (1974). Mathematics laboratories: 150 activities and games for elementary schools. ERIC Information Analysis Center for Science.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHiggins, Jon L., और Larry A. Sachs. Mathematics Laboratories: 150 Activities and Games for Elementary Schools. Columbus: ERIC Information Analysis Center for Science, 1974.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHiggins, Jon L., और Larry A. Sachs. Mathematics Laboratories: 150 Activities and Games for Elementary Schools. ERIC Information Analysis Center for Science, 1974.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.