Aliyu, R., and H. B. Johnson. “PRINCIPALS’ PROFESSIONAL COMPETENCIES AS PREDICTORS OF JOB PERFORMANCE OF TEACHERS IN SECONDARY SCHOOLS, IN SOUTHWEST, NIGERIA”. African Journal of Educational Management, vol. 22, no. 2, Mar. 2022, pp. 133-46, https://journals.ui.edu.ng/index.php/ajem/article/view/711.