Yen, Goh Phay. <br/><br/>
Longman Social Studies :   Revision Guide. 

 - 2nd Ed. 
 - Singapore :   Pearson,   2012. 
 - vi, 120 p. 
<br/><br/><label>ISBN: </label>9789810622480 
<br/><br/><label>Dewey Class. No.: </label>300  / YEN