Johnson, D. A. (1967). Paper folding for the mathematics class. National Council of Teachers Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, Donovan A. Paper Folding for the Mathematics Class. Washington: National Council of Teachers Association, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJohnson, Donovan A. Paper Folding for the Mathematics Class. National Council of Teachers Association, 1967.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.