Bachtiar, T.A. and 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 (Dec. 2021), 151–172. DOI:https://doi.org/10.31436/ijrcs.v4i2.206.