Cita APA (7a ed.)

(2014). A theory of fun for game design / by Raph Koster ; [foreword by Will Wright].

Cita Chicago Style (17a ed.)

A Theory of Fun for Game Design / by Raph Koster ; [foreword by Will Wright]. 2014.

Cita MLA (9a ed.)

A Theory of Fun for Game Design / by Raph Koster ; [foreword by Will Wright]. 2014.