Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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