Japin, Pranom, and Vantipa Roadrangka. 2017. “The state of teaching and learning rates of chemical reactions of chemistry teachers in the Sukhothai Educational Service Area, office 2 (Thai)”. Asia-Pacific Journal of Science and Technology 14 (4):323-35. https://so01.tci-thaijo.org/index.php/APST/article/view/83432.