Sigel Irving E. <br/><br/>
New directions in piagetian theory and practice 

 - Hillsdale  Lawrence Erlbaum Associates, Publishers  1981 
 - xv,377p. 
<br/><br/><label>ISBN: </label>0-89859-072-8 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child Psychology