Polya, George <br/><br/>
How to solve it: a new aspect of mathematical method 

 - London  Penguin Books  1990 
 - xli, 253p. 
<br/><br/><label>ISBN: </label>9780140124996 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics -- Study and teaching,<br/> Mathematics -- Problems, exercises, etc. 
<br/><br/><label>Dewey Class. No.: </label>510.7 POL/H