Sudirjo, Frans, and Sulistiyani Sulistiyani. “Purchasing Decision Behaviours of Health Insurance Products and The Determinants of Competitive Advantage”. Indonesian Journal of Business and Entrepreneurship (IJBE) 9, no. 1 (January 31, 2023): 163. Accessed February 28, 2024. https://jai.ipb.ac.id/index.php/ijbe/article/view/44445.