PURWANTO, Nurtanio Agus. MENGEMBANGKAN PERILAKU ASERTIF KEPALA SEKOLAH. Jurnal Internasional Manajemen Pendidikan, [S. l.], v. 4, n. 02, 2012. Disponível em: https://jurnal.uny.ac.id/index.php/jimp/article/view/744. Acesso em: 14 may. 2025.