SEPTIANI, R. Systematic Literature Review: Principal’s Leadership in Improving Teachers’ Professional Competency in Schools. PPSDP International Journal of Education, [S. l.], v. 4, n. 2, p. 740–758, 2025. DOI: 10.59175/pijed.v4i2.570. Disponível em: https://ejournal.ppsdp.org/index.php/pijed/article/view/570. Acesso em: 10 jul. 2026.