D. A. . Ramadhan, S. . Hasrullah, A. . Kurnia, N. . Zikra, and D. . Sapha, “A Hypothetical Analysis of Expenditure Components on The GDRP Growth of Medan City Before and After the Pandemic: A Keynesian Conceptual Approach”, JAREB, vol. 1, no. 1, pp. 80–89, May 2026.