APA (7th ed.) Citation

(1994). Design patterns: Elements of reusable object-oriented software (2. print.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Design Patterns: Elements of Reusable Object-oriented Software. 2. print. Reading, Mass. u.a: Addison-Wesley, 1994.

MLA (9th ed.) Citation

Design Patterns: Elements of Reusable Object-oriented Software. 2. print. Addison-Wesley, 1994.

Warning: These citations may not always be 100% accurate.