HUNG, L. N. Q. EFL Students’ Perceptions of Online Flipped Classrooms during the Covid-19 Pandemic and Beyond. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 21, n. 9, p. 460–476, 2022. Disponível em: https://ijlter.net/index.php/ijlter/article/view/1426. Acesso em: 18 apr. 2026.