Pummapanth ื. (2020) “Type of Product : Important Roles to Understand”, Journal of Research and Development Institute Rajabhat Maha Sarakham University, 7(1), pp. 303–314. Available at: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/237590 (Accessed: 28 April 2024).