Adju, H.R.S. (2021) “Supervisory Competence and Leadership Style of Secondary School Principal in Jolo, Sulu”, International Journal of Research in Engineering, Science and Management, 4(9), pp. 257–272. Available at: https://journal.ijresm.com/index.php/ijresm/article/view/1403 (Accessed: 7 May 2024).