Phromphet, N., W. Pharanat, and S. Ekphim. “The Development of Creative Artistic Abilities in Painting by using the Flipped Classroom of Grade 8 Students”. Journal of Roi Et Rajabhat University, vol. 16, no. 3, Dec. 2022, pp. 223-35, https://so03.tci-thaijo.org/index.php/reru/article/view/252242.