Cita APA (7a ed.)

Welch, K. (2014). Mastering iOS development: Location services.

Cita Chicago Style (17a ed.)

Welch, Keith. Mastering IOS Development: Location Services. [Place of publication not identified] : Infinite Skills, 2014.

Cita MLA (8a ed.)

Welch, Keith. Mastering IOS Development: Location Services. 2014.