Hasbullah, N. N., and E. F. Fahyuni. “The Leadership of School Principals in Improving Teachers’ Professional Competence (Study of MTs Muhammadiyah Jayapura): Kepemimpinan Kepala Sekolah Dalam Meningkatkan Kompetensi Profesional Guru (Studi MTs Muhammadiyah Jayapura)”. Indonesian Journal of Innovation Studies, vol. 27, no. 2, Sept. 2026, p. 10.21070/ijins.v27i2.1364, doi:10.21070/ijins.v27i2.1364.