APA ציטוט

Ginsburg, H., & Opper, S. (1979). Piaget's theory of intellectual development (2nd ed.). Prentice - hall.

Chicago Style (17th ed.) Citation

Ginsburg, Herbert, and Sylvia Opper. Piaget's Theory of Intellectual Development. 2nd ed. New Jersey: Prentice - hall, 1979.

ציטוט MLA

Ginsburg, Herbert, and Sylvia Opper. Piaget's Theory of Intellectual Development. 2nd ed. Prentice - hall, 1979.