5Adlai-Gail, W. (1994). Exploring the autotelic personality. Unpublished Doctoral Dissertation, University of Chicago.
6Asakawa, K. (2004). Flow experience and autotelic personality in Japanese college students: how do they experience challenges in daily life?. Journal of Happiness Studies, 5(2), 123-154.
7Bloch, C. (2000). Flow: beyond fluidity and rigidity. A Phenomenological Investigation. Human Studies, 23(1), 43-61.
8Carr, A. (2004). Positive psychology: The science of happiness and human strengths. Hove and New York: Brunner-Routledge of Taylor & Francis Group.
9Carl, W. J. (n.d.). Flow -The psychology of optimal experience. history and critical evaluation. Retrieve July 3, 2008, from http ://www.waltercarl.neu.edu/PDFs/Flowpaper.pdf.
10Choi, D., & Kim, J. (2004). Why people continue to play online games: in search of critical design factors to increase customer loyalty to online contents. Cyberpsychology and Behavior, 7(1), 12-24.