(2001). Delta's key to the TOEFL @ test. Delta Publishing Company.
シカゴスタイル引用形Delta's Key to the TOEFL @ Test. Delta Publishing Company, 2001.
MLA引用形式Delta's Key to the TOEFL @ Test. Delta Publishing Company, 2001.
警告: この引用は必ずしも正確ではありません.
(2001). Delta's key to the TOEFL @ test. Delta Publishing Company.
シカゴスタイル引用形Delta's Key to the TOEFL @ Test. Delta Publishing Company, 2001.
MLA引用形式Delta's Key to the TOEFL @ Test. Delta Publishing Company, 2001.