SUPARMAN, A.; MACARIOLA, J. S. Problem Solving Management of Principal in Improving School’s Quality. PPSDP International Journal of Education, [S. l.], v. 1, n. 1, p. 56–73, 2022. DOI: 10.59175/pijed.v1i1.7. Disponível em: https://ejournal.ppsdp.org/index.php/pijed/article/view/7. Acesso em: 10 jul. 2026.