Imiwat, Prayoon, Patomatat Bannalert, Nattapong Rakngam, Phuripat Kaewsri, Thosapon Pongta, Chutima Panyalong, and Neramit Jitruksa. 2018. “ Chiang Rai Province”. Governance Journal 7 (2):173-93. https://so01.tci-thaijo.org/index.php/gjournal-ksu/article/view/163557.