Churahman, Taufik. “Principal’s Leadership Style Correlation With Improved External Quality Assurance System: Korelasi Gaya Kepemimpinan Kepala Sekolah Dengan Peningkatan Sistem Penjaminan Mutu Eksternal”. Halaqa: Islamic Education Journal 6, no. 1 (July 14, 2022): 51–57. Accessed September 8, 2025. https://halaqa.umsida.ac.id/index.php/halaqa/article/view/1603.