Shafie, F. A. ., N. . Suparman, U. A. A. . Mesarandi, D. . Omar, S. . Karuppannan, and L. H. L. Oliver. “Environmentally-Extended Input-Output Analysis for Malaysia”. Healthscope: The Official Research Book of Faculty of Health Sciences, UiTM, vol. 3, no. 3, Sept. 2020, pp. 38 -43, https://healthscopefsk.com/index.php/research/article/view/177.