References
- De Phillips, F. A., W. M. Berliner, and J. J. Cribbin. 1960. Management of Training Programs. Homewood, IL: Richard D. Irwin. (pp. 69) Accessed 25 October, 2023, https://archive.org/details/managementoftrai0000deph/page/68/mode/2up.
- Whitworth, L., H. Kimsey-House, and P. Sandahl. 1998. Co-active Coaching: New Skills for Coaching People Toward Success in Work. Mountain View, CA: Davies-Black Publishing.