Nguyen Ha Truc Giang. (2015). A COMPARISION OF THE FREQUENCY OF OCCURRENCE OF ‘YESTERDAY,’ ‘TODAY,’ AND ‘TOMORROW’ IN ENGLISH NEWS WRITTEN BY VIETNAMESE AND THOSE BY NATIVE SPEAKERS. Tạp Chí Khoa học Và Công nghệ - Đại học Đà Nẵng, 6(91), 137–139. Truy vấn từ https://jst-ud.vn/jst-ud/article/view/107