Cita APA (7a ed.)

Penn, J., & Smith, J. (2014). Creating Awesome iOS Interfaces (1st edition.). O'Reilly Media, Inc.

Cita Chicago Style (17a ed.)

Penn, Jonathan, y Joshua Smith. Creating Awesome IOS Interfaces. 1st edition. O'Reilly Media, Inc, 2014.

Cita MLA (9a ed.)

Penn, Jonathan, y Joshua Smith. Creating Awesome IOS Interfaces. 1st edition. O'Reilly Media, Inc, 2014.