“Reading Profitability through Cost, Profit, and Customer Perspectives: Evidence from PT Siantar Top Tbk, 2021-2025” (2026) Capitalis: Journal of Economic Stability, Banking, and Investment, 1(3), pp. 15–30. Available at: https://sovereignresearch.org/capitalis/article/view/378 (Accessed: 4 November 2026).