Nuansara, Manote, Nampetch Teypinsai, and Chatchaya Chutinatphuwadon. 2021. “GUIDELINE FOR THE DEVELOPMENT OF OTOP AND BRAND PRODUCT TO INTERNATIONAL STANDARDS CHIANG RAI PROVINCE”. Dusit Thani College Journal 15 (1):119-34. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/247433.