Locke, E. A. (2006). New Directions in Goal-Setting Theory.
Current Directions in Psychological Science, 15(5), 265-268.
Deckers, L. (2009). Motivation: Biological, Psychological, and
Environmental (3rd ed). New York: Pearson.
Sheldon, K. (2009). Current Directions in Motivation and Emotion for
Motivation: Biological, Psychological, and Environemtal. New York:
Pearson.
Deci, E. L., Ryan, R. M. (2008). Facilitating optimal motivation and
well-being across life’s domains. Canadian Psychology, 349, 14-23.;
Ratelle, C. F., Guay, F., Wallerand, R.J., Larose, S., Senecal, C.
(2007). Autonomous, controlled and motivated types of academic
motivation: A person-oriented analysis. Journal of Educational
Psychology, 99, 734-746.