1. Affective and semantic components in political person perception.
2. American National Election Studies, Center for Political Studies (n.d.). 1995–2000. Retrieved June 8, 2006, from http://www.electionstudies.org/
3. (1981). Stogdill's handbook of leadership: A survey of theory and research. New York: Free Press.
4. (1985). Leadership and performance beyond expectations. NewYork: Free Press.
5. (1990). Stogdill's handbook of leadership: Theory, research, and managerial applications (3rd ed). New York: Free Press.