อ่อนนุ่ม น., จึงสุวดี ก. and คำผา ป. (2014) “Service Quality of Mueang Ubon Ratchathani Agricultural Co-operatives”, RMUTT Global Business and Economics Review. Pathum Thani, Thailand, 9(2), pp. 1–15. available at: https://so03.tci-thaijo.org/index.php/RMUTT-Gber/article/view/242050 (accessed: 30 August 2026).