APA Citation

Friedl, M. (2003). Online game interactivity theory. Hingham, Mass.: Charles River Media, Inc..

Chicago Style Citation

Friedl, Markus. Online Game Interactivity Theory. Hingham, Mass.: Charles River Media, Inc., 2003.

MLA Citation

Friedl, Markus. Online Game Interactivity Theory. Hingham, Mass.: Charles River Media, Inc., 2003.

Warning: These citations may not always be 100% accurate.