Kitthawee, U. (2016) “THE UPGRADE OF GRILLED SWINE COST FOR SUSTAINABLE DEVELOPMENT IN SAMPHRAN DISTRICT, NAKHON PATHOM PROVINCE”, Journal of Graduate School Sakon Nakhon Rajabhat University. Sakon Nakhon, Thailand, 13(61), pp. 165–172. available at: https://so02.tci-thaijo.org/index.php/SNGSJ/article/view/59258 (accessed: 24 September 2026).