Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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