1. Allen, P., & Bennett, K. (2007). SPSS for the health & behavioural sciences. Thomson.
2. Bartle, R. A. (2004). Designing virtual worlds. New Riders.
3. Cacioppo, J. T., Berntson, G. G., Norris, C. J., & Gollan, J. K. (2011). The evaluative space model. In P. A. M. Van Lange, A. W. Kruglanski, & E. T. Higgins (Eds.), Handbook of Theories of Social Psychology (Vol. 1 & 2, pp. 50–72). SAGE.
4. Give me a reason to dig Minecraft and psychology of motivation
5. Approach, Avoidance, and the Self-Regulation of Affect and Action