Inthajakra, Laddawan, Apipa Prachyapruit, and Supang Chantavanich. “The Emergence of Communication Intellectual History in Sukhothai and Ayutthaya Kingdom of Thailand”. Social Science Asia 2, no. 4 (October 31, 2016): 32-41. Accessed October 20, 2021. https://socialscienceasia.nrct.go.th/index.php/SSAsia/article/view/48.