Bunroek, Pheeraphong. “The Studying of Chemistry Learning Achievement in Bohr’s Theory of Hydrogen Atom for Grade 10 Student by Using Kwdl Learning Techniques”. Journal of Modern Learning Development 6, no. 3 (May 10, 2021): 283–297. Accessed May 18, 2024. https://so06.tci-thaijo.org/index.php/jomld/article/view/247833.