Cita APA (7a ed.)

Dalrymple, M., & Knaster, S. (2008). Learn objective-C on the Mac. Apress.

Cita Chicago Style (17a ed.)

Dalrymple, Mark, y Scott Knaster. Learn Objective-C on the Mac. [Berkeley, Calif.?]: Apress, 2008.

Cita MLA (8a ed.)

Dalrymple, Mark, y Scott Knaster. Learn Objective-C on the Mac. Apress, 2008.