Cahyadi A. THE EFFECT OF TEACHER CERTIFICATION ON TEACHERS??? PERFORMANCE AT SMAN 21 KABUPATEN TANGERANG. JIPIS [Internet]. 2018 May 5 [cited 2026 Apr. 21];26(2):33-7. Available from: https://ejournal.unis.ac.id/index.php/JIPIS/article/view/92