Aspandi, Ade, et al. “The Ijāzah As an Infrastructure of Scholarly Authority: The Legitimation of ʿUlamāʾ Within the Haramayn–Nusantara Network (18th–19th Centuries)”. Arba: Jurnal Studi Keislaman, vol. 2, no. 4, Oct. 2026, pp. 337-55, https://doi.org/10.64691/2yertm90.