Piaget's theory of cognitive development :
Wadsworth, Barry J.
Piaget's theory of cognitive development : an introduction to students of psychology and education / Barry J. Wadsworth. - 2nd ed. - New York : Longman, c1979. - xvi, 189 : ill.
[xeroxed copy]
Biblio. : pp. 182-186.
0582281245
Piaget, Jean, 1896-.
Cognition in children.
Piaget's theory of cognitive development : an introduction to students of psychology and education / Barry J. Wadsworth. - 2nd ed. - New York : Longman, c1979. - xvi, 189 : ill.
[xeroxed copy]
Biblio. : pp. 182-186.
0582281245
Piaget, Jean, 1896-.
Cognition in children.