Gan, Pei-Tha, Siew-Yong Lim, Han Yu, Mohd Yahya Mohd Hussin, and Fidlizan Muhammad. “A NORMATIVE APPROACH TO ECONOMIC UNCERTAINTY ESTIMATION”. Journal of Contemporary Issues and Thought 3 (March 6, 2019): 156-165. Accessed June 20, 2021. https://ejournal.upsi.edu.my/index.php/JCIT/article/view/994.