1. Cicero. (1960). De Inventione. (H. M. Hubbell, Trans.) Cambridge, MA: Harvard University Press.
2. Flow: The psychology of optimal experience;Csikszentmihalyi,1990
3. The pleasures of immersion and engagement: Schemas, scripts and the fifth business;Douglas;Digital Creativity,2001
4. Defining interactivity: A qualitative identification of key dimensions;Downes;New Media & Society,2000
5. Exordium. (n.d.). In Charlton T. Lewis & Charles Short (1879), A Latin Dictionary; Founded on Andrews’ edition of Freund's Latin dictionary. Retrieved from http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0059:entry=exordi^um&highlight=exordior