Muslim, Melati, Mailin Mailin, and Hasnun Jauhari Ritonga. 2026. “Effectiveness Model of Marketing Communication of Bank Sumut Syariah in Increasing Public Interest in Saving at Bank Sumut Syariah KCP Binjai”. Journal of Mathematics Instruction, Social Research and Opinion 4 (4). Bandung, Indonesia:1603–1614. https://doi.org/10.58421/misro.v4i4.910.