Marlina Dahlan, Siti Mayang Sari, Akmaluddin. THE PERFORMANCE OF CERTIFIED AND NON-CERTIFIED TEACHERS IN IMPROVING LEARNING QUALITY OF STATE JUNIOR HIGH SCHOOLS IN SAMATIGA DISTRICT. iconesth [Internet]. 2024 Jan. 26 [cited 2026 Aug. 6];:1028-32. Available from: https://eproceeding.bbg.ac.id/index.php/iconesth/article/view/190