Ka’u, Novariany, and Sugianto Sugianto. “Bank Profitability Analysis Before and After Covid 19 at PT Bank Sumut Syariah KCP Medan”. Jurnal Ekonomi, Manajemen, Akuntansi Dan Keuangan, vol. 3, no. 3, May 2022, pp. 851 –860, doi:10.53697/emak.v3i3.609.