Cahyadi, Ah. “THE EFFECT OF TEACHER CERTIFICATION ON TEACHERS??? PERFORMANCE AT SMAN 21 KABUPATEN TANGERANG”. JIPIS 26, no. 2 (May 5, 2018): 33–37. Accessed April 21, 2026. https://ejournal.unis.ac.id/index.php/JIPIS/article/view/92.