Gamma, Erich and et.al  <br/><br/>
Design patterns  

 - Pearson education of asia   New Delhi   2018 
 - XVIII, 380p.   649 
<br/><br/><label>ISBN: </label>9789332555402 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PROGRAMMING LANGUAGE 
<br/><br/><label>Dewey Class. No.: </label>005.13 GAM