Aybirdi, N., H. Efe, and Çağla A. Şal. “The Impact of Flipped Learning on L2 Learners’ Achievements: A Meta-Analysis”. Shanlax International Journal of Education, Vol. 11, no. S1-Jan, Jan. 2023, pp. 41-60, doi:10.34293/education.v11iS1-Jan.5891.