Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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