Zeleke, B., and M. Bekele. “Perceived Relationship Between Leadership Style and Organizational Commitment in the Poly Technique Colleges of Addis Ababa City Administration”. The Ethiopian Journal of Education, vol. 40, no. 1, June 2021, pp. 187-22, http://ejol.aau.edu.et/index.php/EJE/article/view/1645.