RAMINTO, R.; KHAIRUDIN, K.; RAHAYU, N. P. W. THE ROLE OF PRINCIPAL SUPERVISION, EDUCATION AND TRAINING, AND THE IMPROVEMENT OF TEACHER PROFESSIONALISM AT UPTD SMP NEGERI 2 SEKAMPUNG UDIK, EAST LAMPUNG REGENCY. Journal of Management, Business and Social Sciences, [S. l.], v. 2, n. 2, p. 27–34, 2024. Disponível em: https://journal.ubl.ac.id/index.php/mabuss/article/view/200. Acesso em: 14 oct. 2025.