Risna Husaifa, Niswanto, Ismail. IMPLEMENTATION OF ACADEMIC SUPERVISION BY SCHOOL PRINCIPALS TO IMPROVE TEACHER PERFORMANCE AT GUGUS 9 ELEMENTARY SCHOOLS IN LEMBAH SABIL DISTRICT. IJSET [Internet]. 2024 Aug. 30 [cited 2025 Sep. 11];3(9):1631-8. Available from: https://ijset.org/index.php/ijset/article/view/727