Thianthipkarun P, Jongkonklang S. A Study of Learning Outcome Using Flipped Classroom Approach with Development of the Performance Instruction on Playing Klui Piang-Aw Unit of Grade 9 Students. GS KKU HS [internet]. 2020 Apr. 26 [cited 2026 Sep. 15];8(1):26-40. available from: https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/241432