Thummathong, R. ., T. . Khotbuntao, O. . Thaweerungsrisap, and K. Thathong. “Chemical Literacy Level of Engineering Students, Faculty Engineering, North Eastern University”. Journal of Graduate MCU KhonKaen Campus, vol. 6, no. 4, Dec. 2019, pp. 439-57, https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/228792.