1[1]Hersey P. & Blanchard K.H. Management of Organizational Behavior: Utilizing Human Resources. 2nd Ed [M]. Englewood Cliffs: Prentice-Hall. 1972:99-102.
2[4]Jan P. M. & Bernard C. R. The Case for Directive Leadership [J]. The Academy of Management Executive. 1987, 1(3):301.