Phothikul, Anan. “ In Thawi Watthana District Office Bangkok”. Journal of Management Science Nakhon Pathom Rajabhat University 6, no. 2 (December 27, 2019): 297–309. accessed April 10, 2025. https://so03.tci-thaijo.org/index.php/JMSNPRU/article/view/232943.