Mental imagery in the child a study of the development of imaginal representation /
Piaget, Jean,1896-1980.
Inhelder, Bärbel.
Bovet, Magali.
Chilton, P. A.
London Routledge & K. Paul
1971
Originally published as 'L'Image mentale chez l'enfant sur le développement des représentations imagées'. Paris: Presses Universitaires de France, 1966
Imagination.