PiagetJ1962
(Ohjattu sivulta Lähde:PiagetJ 1962)
Piaget, Jean (1962). Play, Dreams and Imitation in Childhood. London: Routledge & Kegan Paul.
(Original work published in 1951)
Piaget, Jean (1962). Play, Dreams and Imitation in Childhood. London: Routledge & Kegan Paul.
(Original work published in 1951)