Piaget, J., Elkind, D., & Flavell, J. H. (1969). Studies in cognitive development: Essays in honor of Jean Piaget. Oxford University Press.
Citazione stile Chigago Style (17a edizione)Piaget, Jean, David Elkind, e John H. Flavell. Studies in Cognitive Development: Essays in Honor of Jean Piaget. New York: Oxford University Press, 1969.
Citatione MLA (9a ed.)Piaget, Jean, et al. Studies in Cognitive Development: Essays in Honor of Jean Piaget. Oxford University Press, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.