Gamma, Erich. <br/><br/>
Design patterns elements of reusable object oriented soft ware 

 - New Delhi :  Addison Wesley Longman,  2007 
 - 395. 
<br/><br/><label>ISBN: </label>0201455633 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer programmingprograms data
<br/><br/><label>Dewey Class. No.: </label>005.1  / GAM