KITTIWUTTHISAKDI, K., DAM-O, P., SUWANPAYAK, N., & THAMMADECHO, R. (2011). Development of “Functional Groups in Molecules” Models For Fundamental Science Curriculum. Walailak Journal of Science and Technology (WJST), 4(2), 249–258. Retrieved from https://wjst.wu.ac.th/index.php/wjst/article/view/103