Simatupang , Ruth Remilani, Muhammad Rohmadi, and Kundharu Saddhono. “Pemakaian Bahasa Batak Toba Di Lingkungan Pendidikan”. Jurnal Pendidikan Islam Indonesia 2, no. 2 (April 2, 2018): 246-257. Accessed March 28, 2024. https://ojs.pps-ibrahimy.ac.id/index.php/jpii/article/view/78.