2
Sprinthall, Norman A.,
| McGraw-Hill Pub. Co. |
1990
4
Piaget, Jean,
| Orion Press |
1970
5
Brownhill, R. J.
| Croom Helm |
1983
6
Bruner, Jerome S.
| Norton |
1973
7
Egan, Kieran.
| Teachers College Press, Columbia University |
1983
8
Egan, Kieran.
| Teachers College Press, Columbia University |
1983