ketnakorn, Phrabaidikasuphot. 2020. “The academic article The role of opinion leaders of the greater Mekong region : Phra Maha Rajchakru Phon Samek”. Journal of MCU Modern Education Studies 1 (1):33-40. https://so03.tci-thaijo.org/index.php/JMES/article/view/247235.