1. Based on the work of Robert L. Katz. For further details, see Robert L. Katz, "Skills of an Effective Team Leader," Harvard Business Review , September 1974, pp. 90102.
2. "The Johari Window: A Model for Soliciting and Giving Feedback," The 1973 Annual Handbook for Group Facilitators , University Associates, 1973, pp. 114120.