Andi Dwi Wulandari, Muh. Ichwan Musa, Nurman, Anwar Ramli, and Hety Budiyanti. “Analysis of Investment Risk and Share Return in Coal Mining Companies Listed on IDX for The Period 2019-2021”. Economics and Business Journal (ECBIS) 1, no. 4 (May 8, 2023): 247–256. Accessed January 19, 2026. https://ecbis.net/index.php/go/article/view/34.