Παραπομπή σε μορφή APA (7η εκδ.)

Abelson, H., & diSessa, A. A. (1980). Turtle geometry: The computer as a medium for exploring mathematics. Massachusetts Institute of Technology Cambridge Mass.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Abelson, Harold, και Andrea A. diSessa. Turtle Geometry: The Computer as a Medium for Exploring Mathematics. Cambridge Massachusetts: Massachusetts Institute of Technology Cambridge Mass, 1980.

Παραπομπή σε μορφή MLA (8th εκδ.)

Abelson, Harold, και Andrea A. diSessa. Turtle Geometry: The Computer as a Medium for Exploring Mathematics. Massachusetts Institute of Technology Cambridge Mass, 1980.