Sasang, S., and Y. Klaimongkol. “Effects of STEM Education Using Engineering Design Process on Problem Solving Ability of Elementary Students”. An Online Journal of Education, vol. 15, no. 1, June 2020, p. OJED1501003 (11 pages), https://so01.tci-thaijo.org/index.php/OJED/article/view/222493.