1. Adams, J. D., Hayes, J., & Hopson, B. (1976). Transition: Understanding and managing personal change. London: Martin Robertson.
2. Ajzen, I. (1985). From intention to actions: A theory of planned behavior. In J. Kuhl & J. Beckmann (Eds.), Action control: From cognition to behaviour (pp. 11-39). Berlin, Germany: Springer-Verlag.
3. Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179-211.
4. Ancova, D., Kochan, T., Scully, M., Van Maanen, J., & Westney, D. E. (1996). Managing for the future: Organizational behaviour and processes. Boston: South-Western College Publishing.
5. Austin, J. T., & Vancouver, J. B. (1996). Goal constructs in psychology: Structure, process, and content. Psychological Bulletin, 120, 338-375.