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: Paraglyph Press, 2005.

Cita MLA (9th ed.)

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