ดำเวียงคำ ย, วัฒนกูล ธ. Market Structure Analysis and Competitive Strategy of Business of Motor Insurances, Case Study of Udon Thani Province. sujbr [internet]. 2022 Apr. 20 [cited 2025 Jul. 16];16(26):49-60. available from: https://so07.tci-thaijo.org/index.php/sujba/article/view/904