Aji, Dede, and Rifki Rosyad. “Religion and Economics : From the Transformation of the Human Capital Index (HCI) to the Economic Sovereignty of Islamic Boarding Schools in Indonesia ”. Quantitative Economics and Management Studies 1, no. 4 (November 9, 2020): 249–259. Accessed May 27, 2026. https://qemsjournal.org/index.php/qems/article/view/188.