Randika Aji, D. ., Maimunah, E. ., Yuliawan, D. ., & Emalia, Z. . (2023). Analysis of Economic and Social Demographic Factors That Influence the Dependency Ratio on the Island of Sumatra. International Journal of Economics, Management and Accounting (IJEMA), 1(7), 525–536. https://doi.org/10.47353/ijema.v1i7.83