Barker, C. (2003). New Snapshot Pre- Intermediate Language Booster. Pearson Longman.
シカゴスタイル引用形Barker, Chris. New Snapshot Pre- Intermediate Language Booster. Pearson Longman, 2003.
MLA引用形式Barker, Chris. New Snapshot Pre- Intermediate Language Booster. Pearson Longman, 2003.
警告: この引用は必ずしも正確ではありません.