Cita APA (7a ed.)

Dalrymple, M., & Knaster, S. (2009). Learn Objective-C on the Mac (1st ed. 2009.). Apress.

Cita Chicago Style (17a ed.)

Dalrymple, Mark, y Scott Knaster. Learn Objective-C on the Mac. 1st ed. 2009. Berkeley, CA: Apress, 2009.

Cita MLA (9a ed.)

Dalrymple, Mark, y Scott Knaster. Learn Objective-C on the Mac. 1st ed. 2009. Apress, 2009.