Sainaratchai, Krittika, and Komsit Kieanwatana. “The Development of Product and Souvenir Logo of Sa Kaeo”. Academic Journal of Thailand National Sports University 10, no. 2 (May 1, 2018): 119–132. Accessed May 18, 2024. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/248621.