MARDIANA, Nina; KHAIRANI, Fatiah; KHOTIMAH, Lis; JANNAH, Riri Raudhotul; VICTORYNIE, Irnie. The Principal’s Performance as a Supervisor in Improving the Professionalism of Teachers . Global Education Journal, [S. l.], v. 4, n. 2, p. 1523–1528, 2026. DOI: 10.59525/gej.1842. Disponível em: https://journal.civiliza.org/index.php/gej/article/view/1842. Acesso em: 21 jul. 2026.