Koster, R. (2013). A theory of fun for game design (2nd edition.). Sebastopol, CA: O'Reilly.
Citación estilo ChicagoKoster, Raph. A Theory of Fun for Game Design. 2nd edition. Sebastopol, CA: O'Reilly, 2013.
Cita MLAKoster, Raph. A Theory of Fun for Game Design. 2nd edition. Sebastopol, CA: O'Reilly, 2013.
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