Posamentier Alfred S Ed. <br/><br/>
Art of problem solving: A resource for the mathematics teacher 

 - Thousand Oaks, Calfornia  Corwin Press  1996 
 - 465p. 
<br/><br/><label>ISBN: </label>978-1-4522-5545-3 
<br/><br/><label>Source: </label>Reference