Gamma, E. (2020). Design Patterns (13th.). Pearson.
Chicago Style (17th ed.) CitationGamma, Erich. Design Patterns. 13th. New Delhi: Pearson, 2020.
MLA (9th ed.) CitationGamma, Erich. Design Patterns. 13th. Pearson, 2020.
Warning: These citations may not always be 100% accurate.