APA aipamena

Piaget, J. A., & Inhelder, B. (1969). Psychology of the child tr by Helen weaver.

Chicago Style aipamena

Piaget, Jean And, and Barbel Inhelder. Psychology of the Child Tr by Helen Weaver. 1969.

MLA aipamena

Piaget, Jean And, and Barbel Inhelder. Psychology of the Child Tr by Helen Weaver. 1969.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.