THE ROLE OF THE SCHOOL PRINCIPLE AS SUPERVISOR IN IMPROVING TEACHER PROFESSIONALITY RA NAWA KARTIKA VIII SIDOLAJU. (2023). JOURNAL J-MPI : JURNAL MANAJEMEN PENDIDIKAN, PENELITIAN DAN KAJIAN KEISLAMAN, 2(1), 31-36. https://www.ejournal.stitmuhngawi.ac.id/index.php/J-MPI/article/view/104