Cita APA (7a ed.)

Gamma, E. (1995). Design patterns: Elements of reusable object-oriented software. Addison-Wesley.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

Gamma, Erich. Design Patterns: Elements of Reusable Object-oriented Software. Addison-Wesley, 1995.