BIBI, Fiza. Students Perceptions about Flipped Learning during COVID-19 Pandemic at Higher Education in Islamabad. Apex Journal of Social Sciences, [S. l.], v. 2, n. 1, p. 1–16, 2023. Disponível em: https://apexjss.com/index.php/AJSS/article/view/4.. Acesso em: 6 sep. 2025.