Cita APA

Ginsburg, H., & Opper, S. (1969). Piaget's theory of intellectual development: An introduction. New Jersey: Prentice Hall.

Citación estilo Chicago

Ginsburg, Herbert, y Sylvia Opper. Piaget's Theory of Intellectual Development: An Introduction. New Jersey: Prentice Hall, 1969.

Cita MLA

Ginsburg, Herbert, y Sylvia Opper. Piaget's Theory of Intellectual Development: An Introduction. New Jersey: Prentice Hall, 1969.