Ngoc Quynh, Nguyen, 		Quynh Yen, Nguyen, 		Thu Hien, Tran, 		Phuong Thao, Nguyen, 		Sao, Bui, 		Chi, Nguyen, AND 		Hoa, Nguyen.
" THE EFFECTIVENESS OF VSTEP.3-5 SPEAKING RATER TRAINING" <em>VNU Journal of Foreign Studies</em> [Online], Volume 36 Number 4 (2 October 2020)