Cita APA (7th ed.)
Koster, R. (2005). A theory of fun for game design. Paraglyph Press.
Cita Chicago (17th ed.)
Koster, Raph. A Theory of Fun for Game Design. Scottsdale, AZ: Paraglyph Press, 2005.
Cita MLA (9th ed.)
Koster, Raph. A Theory of Fun for Game Design. Paraglyph Press, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.