Sihombing T, Sitio RJT, Simatupang H, Simatupang H. The Influence of School Leader Leadership as Supervisor and Motivator on Teacher Performance . IJCET [Internet]. 2023 Nov. 7 [cited 2026 Apr. 29];2(3):279-94. Available from: https://journal.formosapublisher.org/index.php/ijcet/article/view/6527