Asrul, A. et al. 2023. Mandailing Ulama in the Early 20th Century: The Meaning and Typology. Nahrasiyah: Journal of Aceh and Malay Archipelago Heritage. 1, 1 (Dec. 2023), 1–17. DOI:https://doi.org/10.47766/nahrasiyah.v1i1.1860.