TOEFL preparation guide: test of English as a foreign language : Cẩm nang luyện thi Toefl 97-98 / Michael A. Pyle, Mary Ellen Munoz Page, Jerry Bobrow; Nguyễn Ngọc Linh, Nguyễn Văn Phước, Lê Ngọc Phương Anh. - Pyle, Michael A.