APA引文

Barker, C. (2003). New Snapshot Elementary Language Booster. Pearson Longman.

Chicago Style Citation

Barker, Chris. New Snapshot Elementary Language Booster. Pearson Longman, 2003.

MLA引文

Barker, Chris. New Snapshot Elementary Language Booster. Pearson Longman, 2003.

警告：這些引文格式不一定是100％准確.