Ason, C., and T. Quitalig. “Managerial Skills of High School Principals: Their Influence on the Morale of Teachers”. SSU - Digital Archive for Theses and Dissertations, vol. 17, no. 1, Dec. 2022, pp. 1-137, https://datd.ssu.edu.ph/index.php/datd/article/view/276.