SUTARMAN, S. Principal Managerial Competence in Improving Teacher Performance at SMP PGII Bandung. The International Journal of Education Management and Sociology, [S. l.], v. 2, n. 1, p. 8–17, 2023. DOI: 10.58818/ijems.v2i1.23. Disponível em: https://www.ijems.id/index.php/ijems/article/view/23. Acesso em: 1 may. 2026.