The Leadership Development Handbook, Center for Creative Leadership and Organizational Behavior, 4th ed, by Stephen Robbins, Bruce Millet & Terry Waters-Marsh, published by Prentice Hall
See Cromwell S., Kolb J. (2004). "An examination of work-environment support factors affecting transfer of supervisory skills training to the work place". Human Resource Development Quarterly. 15 (4): 449–71. doi:10.1002/hrdq.1115.