GitHub - skatesham/design-pattern-implementation: Design Pattern of the Gang of Four (GoF)
GoF Design Pattern Template: Catalog
Amazon.com: The Gang of Four Design Patterns Simplified: All the 23 design patterns explained in simple language with use cases and java code. eBook : Sahaya Raja, Vijay: Books
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Gangs of Four (GoF) Design Patterns | DigitalOcean
Design Pattern Cheat Sheet : r/programming
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Design patterns and where to find them | by Nitin Kishore | Medium