ชิโนกุล ช. (2018) “MARKETING MIX OF ENTERPRISES IN UPPER NORTHERN SPECIAL ECONOMIC ZONE: Chaiyuth Chinokul”, Journal of MCU Social Science Review. Ayutthaya, Thailand, 7(2), pp. 1–7. Available at: https://so03.tci-thaijo.org/index.php/jssr/article/view/132585 (Accessed: 8 October 2022).