Tjan, Charles, Setiawan Setiawan, Henderson Henderson, Hardianto Hardianto, and Jolin Jolin. “Risk Management Analysis of Kopitiam Singkawang Business”. Journal of Management Science (JMAS) 6, no. 1 (January 23, 2023): 47–51. Accessed May 16, 2026. https://exsys.iocspublisher.org/index.php/JMAS/article/view/192.