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22,19€(IVA inc.)
Game-based marketing: inspire customer loyalty through rewards, challenges, and contests
- Zichermann, Gabe
- 978-0-470-56223-9
- 2010-04-07
24,80€(IVA inc.)
Gamification by design: implementing game mechanics in web and mobile apps
- Gabe, Zichermann
- 978-1-4493-9767-8
- 2011-08-31