Sitepu, B. P. “URGENSI PENGATURAN PERBUKUAN NASIONAL”. Perspektif Ilmu Pendidikan 23, no. XIV (April 29, 2011): 100 - 107. Accessed June 9, 2025. http://103.8.12.212:33180/unj/index.php/pip/article/view/7407.