Sulastri, Sulastri, Happy Fitria, and Alfroki Martha. “Kompetensi Profesional Guru Dalam Meningkatkan Mutu Pendidikan”. Journal of Education Research 1, no. 3 (December 1, 2020): 258–264. Accessed January 11, 2026. https://jer.or.id/index.php/jer/article/view/30.