Ja’far, Ja’far. “From Mandailing Land to Haramayn: Mandailing Ulama and the Religious Sciences in the Early 20th Century”. Hikmah 19, no. 2 (December 30, 2022): 187–201. Accessed October 19, 2025. https://e-jurnal.staisumatera-medan.ac.id/index.php/hikmah/article/view/169.