Saputra, Rangga Dzaki, and Roosemarina Anggraini Rambe. 2025. “Applying Keynesian Theory to Identify Determinants of Gross Regional Domestic Product: Comparative Evidence from Java and Sumatra”. Economics, Management and Sustainability 10 (1):66-73. https://doi.org/10.14254/jems.2025.10-1.4.