Παραπομπή σε μορφή APA (7η εκδ.)

Furth, H. G. (1981). Piaget and knowledge: Theoritical foundations (2nd ed.). The University of Chicago Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Furth, Hans G. Piaget and Knowledge: Theoritical Foundations. 2nd ed. Chicago: The University of Chicago Press, 1981.

Παραπομπή σε μορφή MLA (9th εκδ.)

Furth, Hans G. Piaget and Knowledge: Theoritical Foundations. 2nd ed. The University of Chicago Press, 1981.