APA (7th ed.) Citation

Gamma, E. (1995). Design patterns : elements of reusable object-oriented software / Erich Gamma ... [et al.]: Elements of reusable object-oriented software. Addison-Wesley.

Chicago Style (17th ed.) Citation

Gamma, Erich. Design Patterns : Elements of Reusable Object-oriented Software / Erich Gamma ... [et Al.]: Elements of Reusable Object-oriented Software. Reading, Mass.: Addison-Wesley, 1995.

MLA (9th ed.) Citation

Gamma, Erich. Design Patterns : Elements of Reusable Object-oriented Software / Erich Gamma ... [et Al.]: Elements of Reusable Object-oriented Software. Addison-Wesley, 1995.

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