Pyle, M. A., & Michael A Pyle; Mary Ellen Munoz Page; Jerry Bobrow; Nguyễn Ngọc Linh; Nguyễn Văn Phước; Lê Ngọc Phương Anh. (2007). Cẩm nang luyện thi TOEFL 97-98 =: Cliffs toefl preparation guide : Includes all the latest changes in toefl. Tp. Hồ Chí Minh: Trẻ.
Παραπομπή Chicago StylePyle, Michael A., και Michael A Pyle; Mary Ellen Munoz Page; Jerry Bobrow; Nguyễn Ngọc Linh; Nguyễn Văn Phước; Lê Ngọc Phương Anh. Cẩm Nang Luyện Thi TOEFL 97-98 =: Cliffs Toefl Preparation Guide : Includes All the Latest Changes in Toefl. Tp. Hồ Chí Minh: Trẻ, 2007.
Παραπομπή MLAPyle, Michael A., και Michael A Pyle; Mary Ellen Munoz Page; Jerry Bobrow; Nguyễn Ngọc Linh; Nguyễn Văn Phước; Lê Ngọc Phương Anh. Cẩm Nang Luyện Thi TOEFL 97-98 =: Cliffs Toefl Preparation Guide : Includes All the Latest Changes in Toefl. Tp. Hồ Chí Minh: Trẻ, 2007.