“ The Principal’s Strategy in Improving the Quality of Teacher Competence at Senior High School: Strategi Kepala Sekolah Dalam Meningkatkan Kualitas Kompetensi Guru di SMA” (2022) Academia Open, 6, p. 10.21070/acopen.6.2022.2287. doi:10.21070/acopen.6.2022.2287.