Kosanwattana, Sikarin, Aphisit Kitcharoen, Saranyu Pongprasertsin, Chetha Chaiyadej, Pichet Saengthien, Vatcharapol Koochad, Jamriang Prombutr, and Angsumalee Samerporn. 2023. “ Chiang Rai”. Saengtham College Journal 15 (1). Nakhon Phathom, Thailand:154-69. https://so01.tci-thaijo.org/index.php/scj/article/view/266328.