เหย่ เถียน. “The research of the grammaticalization of Thai verb ‘lɛ́ɛw’ in Sukhothaiperiod”. Academic and Research Journal of Liberal Arts (Online) 14, no. 1 (June 7, 2019): 21–34. accessed September 28, 2026. https://so04.tci-thaijo.org/index.php/larhcu/article/view/193138.