APA (7th ed.) Citation

Harold Abelson, A. A. D. Turtle geometry The computer as a medium for exploring mathematics. The Mit Press.

Chicago Style (17th ed.) Citation

Harold Abelson, Andrea A. Disessa. Turtle Geometry The Computer as a Medium for Exploring Mathematics. The Mit Press.

MLA (8th ed.) Citation

Harold Abelson, Andrea A. Disessa. Turtle Geometry The Computer as a Medium for Exploring Mathematics. The Mit Press.

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