Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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