Three theories of child development : the contributions of Erik H. Erikson, Jean Piaget, and Robert R. Sears and their applications /
Henry W. Maier.
- New York : Harper, 1969.
- ix, 342 p. : ill.
Bibliography : p. 305-325.
Erikson, Erik Homburger, 1902- Piaget, Jean, 1896- Sears, Robert Richardson, 1908-