CHOBTHAMDEE , B. .; LANGPRAYOON, P. Development of Learning Activities in Flipped Classroom to Enhance English Speaking Skill of Undergraduate Students in Elementary Major. วารสารสันติศึกษาปริทรรศน์ มจร, [S. l.], v. 10, n. 5, p. 1869–1879, 2022. Disponível em: https://so03.tci-thaijo.org/index.php/journal-peace/article/view/249995. Acesso em: 2 ก.พ. 2023.