Gamma, E., et al <br/><br/>
Design patterns  elements of reusable object-oriented software 
E. Gamma, et al 
 - Singapore  Addison-Wesley  1995 
 - xv  395 
 - Addison-wesley professional computing series .
<br/><br/><label>ISBN: </label>8178081350 
<br/><br/><label>Dewey Class. No.: </label>18  / GAMM