Olowo, Busuyi Francis. “Principals’ Supervisory Skills: Precursor of teachers’ Morale and Instructional Delivery in Southwestern Nigerian Secondary Schools”. Educational Management and Advancement Journal 1, no. 1 (February 28, 2026): 19–26. Accessed August 4, 2026. https://journal.kadewaguru.org/index.php/EduMAJ/article/view/53.