Freeman, E., Freeman, E., Sierra, K., & Bates, B. (2004). Head First design patterns. O'Reilly ; Shroff publishers & distributors.
Citazione stile Chigago Style (17a edizione)Freeman, Eric, Elisabeth Freeman, Kathy Sierra, e Bert Bates. Head First Design Patterns. Sebastopol, CA : New Delhi: O'Reilly ; Shroff publishers & distributors, 2004.
Citatione MLA (8a ed.)Freeman, Eric, et al. Head First Design Patterns. O'Reilly ; Shroff publishers & distributors, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.