Bachtiar, T. A., & Nandang Nursaleh. (2021). Indonesian Sultanates and Their Alleged Allegiance to Islamic Caliphates: A Historical Analysis of “Jejak Khilafah di Nusantara”. IIUM Journal of Religion and Civilisational Studies, 4(2), 151–172. https://doi.org/10.31436/ijrcs.v4i2.206