Abelson, H., & diSessa, A. (1986). Turtle Geometry: The Computer as a Medium for Exploring Mathematics. The MIT Press. https://doi.org/10.7551/mitpress/6933.001.0001
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAbelson, Harold, और Andrea diSessa. Turtle Geometry: The Computer as a Medium for Exploring Mathematics. Cambridge: The MIT Press, 1986. https://doi.org/10.7551/mitpress/6933.001.0001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAbelson, Harold, और Andrea diSessa. Turtle Geometry: The Computer as a Medium for Exploring Mathematics. The MIT Press, 1986. https://doi.org/10.7551/mitpress/6933.001.0001.
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