., Erawadi. “Mandailing Scholar of the XX Century: Sufism Thought of Syeikh Syihabuddin Nasution Aek Libung (1892 -- 1967)”. KnE Social Sciences 8, no. 4 (March 3, 2023): 549–558. Accessed April 26, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/12943.