1. Holy Quran.
2. Al-Sunnah.
3. Asgari, Ali., Abu Daud Silong., Aminah Ahmad., and Bahaman Abu Sama (2008). “The Relationship between Transformational Leadership Behaviors, Leader-Member Exchange and Organizational Citizenship Behaviors”. European Journal of social sciences. Vol. 6. No. 4.
4. Bass, Bernard. 2007. “The Inspirational Processes of Leadership”. State University of New York. Binghamton. USA.
5. Bass, Bernard M. and Ronald E. Riggio (2006).“Transformational Leadership” 2nd Edition. Lawrencw Erlbaum Associates. Publishers. Mahwah. New Jersey. London.