Jiang, Na, Siaw Yan-Li, Kanit Pamanee, and Joko Sriyanto. “Depression, Anxiety, and Stress During the COVID-19 Pandemic: Comparison Among Higher Education Students in Four Countries in the Asia-Pacific Region”. Journal of Population and Social Studies [JPSS] 29, no. - (April 13, 2021): 370 - 383. Accessed August 4, 2021. https://so03.tci-thaijo.org/index.php/jpss/article/view/244216.