Cita APA (7a ed.)

Buttfield-Addison, P., Manning, J., & Nugent, T. (2001). Learning Cocoa. O'Reilly.

Cita Chicago Style (17a ed.)

Buttfield-Addison, Paris, Jonanthon Manning, y Tim Nugent. Learning Cocoa. [Place of publication not identified]: O'Reilly, 2001.

Cita MLA (9a ed.)

Buttfield-Addison, Paris, et al. Learning Cocoa. O'Reilly, 2001.