APA (7th ed.) Citation

Ginsburg, H. P., & Opper, S. (1988). Piaget's theory of intellectual development (3rd ed.). Prentice-Hall.

Chicago Style (17th ed.) Citation

Ginsburg, Herbert P., and Sylvia Opper. Piaget's Theory of Intellectual Development. 3rd ed. Englewood Cliffs, N.J: Prentice-Hall, 1988.

MLA (9th ed.) Citation

Ginsburg, Herbert P., and Sylvia Opper. Piaget's Theory of Intellectual Development. 3rd ed. Prentice-Hall, 1988.