Thammachat, Phongrat. “REPORT ON THE USE OF THE PROBLEM - SOLVING SKILLS IN CHEMISTRY CALCULATION TOGETHER WITH ORGANIZING VARIOUS LEARNING ACTIVITIES IN CHEMISTRY THE STOICHIOMETRY LEARNING UNIT OF THE 10TH GRADE STUDENTS”. Journal of MCU Nakhondhat 8, no. 3 (March 31, 2021): 99–112. Accessed April 25, 2024. https://so03.tci-thaijo.org/index.php/JMND/article/view/251154.