Afifah Angkat, Rafika, and Nursantri Yanti. “The Effect of Product and Service Quality on Customer Satisfaction Loyalty Priority Savings Bank Sumut Syariah”. Jurnal Ekonomi, Manajemen, Akuntansi Dan Keuangan, vol. 4, no. 2, Apr. 2023, pp. 245 – 252, doi:10.53697/emak.v4i2.1165.