Wunchoay, K., and N. Nuengwang. “OTOP PRODUCT DEVELOPMENT STRATEGY TO INCREASE THE COMPETITIVENESS OF THE UPPER EASTERN REGION (PRACHINBURI, CHACHOENGSAO, SA KAEO)”. Journal of MCU Nakhondhat, vol. 13, no. 7, June 2026, pp. 122-34, https://so03.tci-thaijo.org/index.php/JMND/article/view/301280.