1. Challenges to Secondary School Principals’ Leadership in Northern Region of Nigeria.;O.Abdulrasheed;Brock Journal of Education,2015
2. Abu Daud, S. (2009). Leadership theories, research and practices: Framing future leadership thinking. Penerbit Universiti Putra Malaysia.
3. Transformational Leadership of Superiors and Creativity Level among Faculty Members in Jordanian Universities.;A. S.Alzawahreh;Journal of Institutional Research South East Asia,2011
4. Context and leadership: an examination of the nine-factor full-range leadership theory using the Multifactor Leadership Questionnaire
5. Avolio, B. J., & Bass, B. M. (2004), Multifactor Leadership Questionnaire: Third Edition Manual and Sampler set. Menlo Park, CA: Mind Garden.