== المراجع ==* Aaron Hillegass: Cocoa Programming for Mac OS X, Addison-Wesley, 3rd Edition 2008, Paperback, ISBN 0-321-50361-9.
==See also====References====Bibliography==*Aaron Hillegass: "Cocoa Programming for Mac OS X", Addison-Wesley, 3rd Edition 2008, Paperback, ISBN 0-321-50361-9.