Ginsburg, Suzanne Designing the iPhone user experience : a user-centered approach to sketching and prototyping iPhone apps / Suzanne Ginsburg - Upper Saddle River, NJ. : Addison-Wesley, 2011 - xxxi, 294 p. : col. ill. ; 26 cm. Includes index ISBN: 9780321699435 (pbk.) Subjects--Topical Terms: iPhone (Smartphone)--ProgramingApplication software--Development