HAMKA, H. The Role of Principals on Teacher Performance Improvement in a Suburban School. QALAMUNA: Jurnal Pendidikan, Sosial, dan Agama, [S. l.], v. 15, n. 1, p. 371–380, 2023. DOI: 10.37680/qalamuna.v15i1.2409. Disponível em: https://ejournal.insuriponorogo.ac.id/index.php/qalamuna/article/view/2409. Acesso em: 31 jul. 2025.