APA (7th ed.) Citation

Walz, S. P., & Deterding, S. (2014). The gameful world: Approaches, issues, applications. The MIT Press.

Chicago Style (17th ed.) Citation

Walz, Steffen P., and Sebastian Deterding. The Gameful World: Approaches, Issues, Applications. Cambridge, Massachusetts ; London, England: The MIT Press, 2014.

MLA (9th ed.) Citation

Walz, Steffen P., and Sebastian Deterding. The Gameful World: Approaches, Issues, Applications. The MIT Press, 2014.