ketnakorn P. The academic article The role of opinion leaders of the greater Mekong region : Phra Maha Rajchakru Phon Samek. JMES [internet]. 2020 Nov. 29 [cited 2025 Dec. 24];1(1):33-40. available from: https://so03.tci-thaijo.org/index.php/JMES/article/view/247235