D. C. Dewi and R. Agustina, “The Effect of Marketing Mix on Customer Satisfaction Level at Bank Sumsel Babel Pagar Alam Branch: A Case Study of Hajj Savings in 2021-2023”, J. EMT KITA, vol. 9, no. 4, pp. 1768–1777, Oct. 2025, doi: 10.35870/emt.v9i4.4664.