1.
Design Patterns: Elements of Reusable Object-Oriented Software
by Erich Gamma, Richard Helm, ...
ISBN: 9780201633610
List Price: $59.99
2.
Design Patterns: Elements of Reusable Object-Oriented Software (Addison-Wesley Professional ...
by Erich; Helm, Richard; Johns...
ISBN: 9788131700075
3.
H1 Genuine Special Design Patterns : Elements of Reusable Object-Oriented Software ( in Engl...
by Erich Gamma Richard Helm Ra...
ISBN: 9787111095071