Wangmuthitakul, Kewalin, Parinya Thongsorn, and Panpetch Romsye. 2022. “Effects of Using Communicative Language Teaching (CLT) and Flipped Classroom Method on English Learning Achievement and Satisfication of Seconsary Students”. Mahachula Academic Journal 9 (3). Bangkok, Thailand:469-83. https://so04.tci-thaijo.org/index.php/JMA/article/view/261717.