Nguyen Thi Quynh Hoa, and Le Thi Anh Tuyen. “A STUDY OF COHESIVE DEVICES IN IELTS LISTENING TASKS”. UED Journal of Social Sciences, Humanities and Education, Vol. 9, no. 5, Dec. 2019, pp. 67-74, https://jshe.ued.udn.vn/index.php/jshe/article/view/104.