Don Ramli, Dona Raihana, Kadaruddin Aiyub, and Kadir Arifin. 2016. “Social Return on Investment (SROI) Framework for Measuring the Real Value of Sungai Muda Flood Mitigation Program”. GEOGRAFI 4 (2):92-99. https://ojs.upsi.edu.my/index.php/GEOG/article/view/1938.