APA (7th ed.) Citation

(2004). Head First design patterns / Eric Freeman, Elisabeth Freeman, with Kathy Sierra and Bert Bates.

Chicago Style (17th ed.) Citation

Head First Design Patterns / Eric Freeman, Elisabeth Freeman, with Kathy Sierra and Bert Bates. 2004.

MLA (9th ed.) Citation

Head First Design Patterns / Eric Freeman, Elisabeth Freeman, with Kathy Sierra and Bert Bates. 2004.

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