APA (7th ed.) Citation

Abelson, H., & DiSessa, A. A. (1981). Turtle geometry: The computer as a medium for exploring mathematics. MIT Press.

Chicago Style (17th ed.) Citation

Abelson, Harold, and Andrea A. DiSessa. Turtle Geometry: The Computer as a Medium for Exploring Mathematics. Cambridge, Mass: MIT Press, 1981.

MLA (9th ed.) Citation

Abelson, Harold, and Andrea A. DiSessa. Turtle Geometry: The Computer as a Medium for Exploring Mathematics. MIT Press, 1981.

Warning: These citations may not always be 100% accurate.