APA Style
Abelson, H., DISESSA, A, A. (1981).
Turtle Geometry: The Computer as a Medium for Exploring Mathematics .
Cambridge:
The MIT Press.
MLA Style
Abelson, Harold.., DISESSA, Andrea, A..
"Turtle Geometry: The Computer as a Medium for Exploring Mathematics".
Cambridge:
The MIT Press,
1981.
Text.