Gamma, Erich; Helm, Richard;  Johnson, Ralph & Vlissides, John <br/><br/>
design patterns  Elements of reusable object-oriented software 

 - Pearson education pte. ltd., Singapore  1995 
 - xv, 395 
<br/><br/><label>ISBN: </label>81-7808-135-0 
<br/><br/><label>Dewey Class. No.: </label>001.642 Gam