Lua APA (7ú heag.)

Koster, R. (2005). A theory of fun for game design. Paraglyph Press.

Lua i Stíl Chicago (17ú heag.)

Koster, Raph. A Theory of Fun for Game Design. Scottsdale: Paraglyph Press, 2005.

Lua MLA (9ú heag.)

Koster, Raph. A Theory of Fun for Game Design. Paraglyph Press, 2005.

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