Liawruangrath พ., Khuankaew จ., and Thapinta เ. “UPSTREAM SUPPLY CHAIN MANAGEMENT OF AGRICULTURAL PRODUCTS IN PERI-URBAN AREA: CASE STUDY OF TUMBON NONG PHUENG, YANG NOENG AND SARAPHI, SARAPHI DISTRICT, CHIANG MAI PROVINCE”. Panyapiwat Journal, vol. 13, no. 2, Aug. 2021, pp. 148-61, https://so05.tci-thaijo.org/index.php/pimjournal/article/view/247535.