Nguyen, T.B. 2020. The effect of applying “Small talk as warming-up technique” in EFL classrooms on students’ improvement in English speaking skill. Tạp chí Khoa học Đại học Đồng Tháp. 9, 6 (tháng 12 2020), 17–24. DOI:https://doi.org/10.52714/dthu.9.6.2020.827.