Gallagher, N. (2004). Delta's key to the TOEFL test. Tp. Hồ Chí Minh: Trẻ.
シカゴスタイル引用形Gallagher, Nancy. Delta's Key to the TOEFL Test. Tp. Hồ Chí Minh: Trẻ, 2004.
MLA引用形式Gallagher, Nancy. Delta's Key to the TOEFL Test. Tp. Hồ Chí Minh: Trẻ, 2004.
警告: この引用は必ずしも正確ではありません.