Papalia, Diane E, et al. <br/><br/>
Human development 

 - 9 
 -  TATA McGraw-Hill Publishing Company Ltd., New Delhi  2004 
 - 706 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential & genetic psychology (Developmental psychology)
<br/><br/><label>Dewey Class. No.: </label>155  PAP-H9