APA (7th ed.) Citation

GAMMA, E. (1995). Design Patterns: Elements of Reusable Object Oriented Sofware. Addison Wesley.

Chicago Style (17th ed.) Citation

GAMMA, Erich. Design Patterns: Elements of Reusable Object Oriented Sofware. Addison Wesley, 1995.

MLA (8th ed.) Citation

GAMMA, Erich. Design Patterns: Elements of Reusable Object Oriented Sofware. Addison Wesley, 1995.

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