Mubarak, H., and S. Kadariah. “The Existence of Islamic Financial Institutions in Improving Community Economic Levels (Case Study of PT. BPRS Alwasliyah Krakatau Medan)”. Jurnal Mantik, vol. 4, no. 3, Nov. 2020, pp. 2164-70, doi:10.35335/mantik.Vol4.2020.1096.pp2164-2170.