APA Edition Citation

Gamma, E., Helm, R., Johnson, R., & Vlissides, J. (2002). Design patterns: Elements of reusable object-oriented software. Pearson.

Chicago Edition Citation

Gamma, Erich, Richard Helm, Ralph Johnson, and Jihn Vlissides. Design Patterns: Elements of Reusable Object-oriented Software. New Delhi: Pearson, 2002.

MLA Edition Citation

Gamma, Erich, et al. Design Patterns: Elements of Reusable Object-oriented Software. Pearson, 2002.