Tjan, C., S. Setiawan, H. Henderson, H. Hardianto, and J. Jolin. “Risk Management Analysis of Kopitiam Singkawang Business”. Journal of Management Science (JMAS), vol. 6, no. 1, Jan. 2023, pp. 47-51, https://exsys.iocspublisher.org/index.php/JMAS/article/view/192.