เกาศล ณ. (2019) “The Transformation of the Thai Economic Systems of Trading from Sukhothai period until Early Rattanakosin Period”., Chophayom Journal, 30(1), pp. 83–94. available at: https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/127218 (accessed: 14 September 2026).