* Bill Cheeseman: Cocoa Recipes for Mac OS X, Peachpit Press, 1st Edition 2002, Paperback, ISBN 0-201-87801-1.
*Erik M. Buck, Donald A. Yacktman: "Cocoa Design Patterns", Addison-Wesley Professional, 1st Edition 2009, Paperback, ISBN 978-0321535023*Bill Cheeseman: "Cocoa Recipes for Mac OS X", Peachpit Press, 1st Edition 2002, Paperback, ISBN 0-201-87801-1.