Cita APA (7th ed.)

Piaget, J., Inhelder, B., & Weaver, H. (1969). The psychology of the child. Basic Books.

Cita Chicago (17th ed.)

Piaget, Jean, Barbel Inhelder, i Helen Weaver. The Psychology of the Child. New York: Basic Books, 1969.

Cita MLA (9th ed.)

Piaget, Jean, et al. The Psychology of the Child. Basic Books, 1969.