Psychology of exceptional children and youth / 
ed. William M. Cruickshank. 
 - 2a ed. 
 - Englewood Cliffs [E.U.A.] :  Prentice-Hall,  1963. 
 - 623 p. 
 - Prentice-Hall psychology series .
<br/><br/><label>Encabezamiento--Tema: </label><br/>Niņo, Estudio del<br/>Psicoterapia