Gamma Erich  <br/><br/>
Design Patterns  Elements of Reusable Object - Oriented Software 

 - New Delhi  Dorling kindersley Publishing Inc  2013 
 - ix+395p 
<br/><br/><label>ISBN: </label>9788131700075 
<br/><br/><label>Dewey Class. No.: </label>005.133 GAM;13