BennisW. G. (1959). Leadership theory and administrative behavior: The problem of authority. Administrative Science Quarlerly, 4, 259–260.
2.
FleishmanE. A., MumfordM. D., ZaccaroS. J., LevinK. Y., KorotkinA. L., & HeinM. B. (1991). Taxonomic efforts in the description of leader behavior: A synthesis and functional interpretation. Leadership Quarlerly, 2(4), 245–287.
3.
KouzesJ. M., & PosnerB. Z. (1995). The leadership challenge: How to keep getting extraordinary things done in organizations.San Francisco: Jossey-Bass.
4.
NortonM. S. (2005). Executive leadership for effective administration.Boston: Pearson Education.