APA (7e ed.) Bronvermelding
Ginsburg, H., & Opper, S. (1969). Piaget's theory of intellectual development: An introduction. Prentice Hall.
Chicago (17e ed.) Bronvermelding
Ginsburg, Herbert, en Sylvia Opper. Piaget's Theory of Intellectual Development: An Introduction. New Jersey: Prentice Hall, 1969.
MLA (9e ed.) Bronvermelding
Ginsburg, Herbert, en Sylvia Opper. Piaget's Theory of Intellectual Development: An Introduction. Prentice Hall, 1969.
Let op: Deze citaties zijn niet altijd 100% accuraat.