Widyastuti, E., and A. Sholihah. “Faktor Penentu Surplus Underwriting Dana Tabarru’ Asuransi Jiwa Syariah Di Indonesia Periode 2015-2020”. El-Jizya : Jurnal Ekonomi Islam, vol. 10, no. 1, July 2022, pp. 67-84, doi:10.24090/ej.v10i1.6231.