Hattawong, Adirek, Supiya Tapta, and Bhumbhong Jomhongbhibhat. 2022. “Development of Learning Achievement on the Topic of the Consumption of the Goods and the Services of the Fourth-Grade Students by Using Project-Based Learning Activities”. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University 17 (3):87-98. https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/257408.