Cita APA (7th ed.)

Wadsworth, B. J. (2004). Piaget's theory of cognitive and affective development (5a. ed.). Pearson Education Inc.

Cita Chicago (17th ed.)

Wadsworth, Barry J. Piaget's Theory of Cognitive and Affective Development. 5a. ed. Boston: Pearson Education Inc, 2004.

Cita MLA (9th ed.)

Wadsworth, Barry J. Piaget's Theory of Cognitive and Affective Development. 5a. ed. Pearson Education Inc, 2004.