Mubarak, Husni, and Siti Kadariah. 2020. “The Existence of Islamic Financial Institutions in Improving Community Economic Levels (Case Study of PT. BPRS Alwasliyah Krakatau Medan)”. Jurnal Mantik 4 (3):2164-70. https://doi.org/10.35335/mantik.Vol4.2020.1096.pp2164-2170.