Cita APA (7th ed.)
Elkind, D., & Flavell, J. H. (1969). Studies in cognitive development: Essays in honor of Jean Piaget.
Cita Chicago (17th ed.)
Elkind, David, i John H. Flavell. Studies in Cognitive Development: Essays in Honor of Jean Piaget. 1969.
Cita MLA (9th ed.)
Elkind, David, i John H. Flavell. Studies in Cognitive Development: Essays in Honor of Jean Piaget. 1969.
Atenció: Aquestes cites poden no estar 100% correctes.