1. ASTD. (2003). ASTD 2003 state of the industry report: Executive summary. Alexandria, VA: ASTD.
2. Available at http://www.astd.org/NR/rdonlyres/FA1B45D6-5055-414F-AFB0-BB2E4FF14FCA/0/2003_SOIR_press_rel.pdf. Retrieved Apr.2, 2004.
3. TRANSFER OF TRAINING: A REVIEW AND DIRECTIONS FOR FUTURE RESEARCH
4. (1986). Social foundations of thought and action. Upper Saddle River, NJ: Prentice Hall.
5. (1997). Self-efficacy: The exercise of control. New York: Freeman.