Intahlor, Pimprapa, and Pitak Youme. 2018. “The Development of Thinking Levels of Chemical Activity Packages in Chemical Reaction”. Academic Journal of Thailand National Sports University 10 (2). Chonburi, Thailand:39-52. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/248565.