Situational Leadership
Blanchard, K., Blanchard, M., Carew, D., Parisi-Carew, E., Finch, F., Hawkins, L., Zigarmi, D., & Zigarmi, P. (2007). Chapter 5. Situational leadership® II: The integrating concept. In K. Blanchard, Leading at a higher level. Prentice Hall
Ken Blanchard updates his widely used theory and practice of Situational Leadership.