Cunningham,Christopher Gamification by design: implementing game mechanics in web and mobile apps - 2nd ed. - Mumbai: Shroff Publishers & Distributors pvt.ltd, 2011 - xi,182 p. ISBN: 9789350234549 Subjects--Topical Terms: Designing GamificationGamification PrinciplesGamification Strategies Dewey Class. No.: 006.7 CUN