Mukhtar, Hidayat and Meichaty, A. 2020. EFFECTIVENESS OF TEACHER CERTIFICATION IN IMPROVING SERVICE PROFESSIONAL SERVICE IN MADRASAH ALIYAH STATE OF JAMBI PROVINCE. International Journal of Research -GRANTHAALAYAH. 7, 12 (Jun. 2020), 292–314. DOI:https://doi.org/10.29121/granthaalayah.v7.i12.2019.323.