Bachtiar, T. A., and Nandang Nursaleh. “Indonesian Sultanates and Their Alleged Allegiance to Islamic Caliphates: A Historical Analysis of ‘Jejak Khilafah Di Nusantara’”. IIUM Journal of Religion and Civilisational Studies, vol. 4, no. 2, Dec. 2021, pp. 151-72, doi:10.31436/ijrcs.v4i2.206.