Borotoding, K. et al. 2021. Pengaruh Kepemimpinan Kepala Sekolah terhadap Mutu Pendidikan di SMK Kristen Bittuang (The Influence of Principal Leadership on the Quality of Education at Bittuang Christian Vocational School). Jurnal Pendidikan Tambusai. 5, 1 (Jun. 2021), 1–6.