APA引文

Boyd, E. (2009). Premium: C1 level (Coursebook). Harlow (England): Pearson education limited.

Trích dẫn kiểu Chicago

Boyd, Elaine. Premium: C1 Level (Coursebook). Harlow (England): Pearson education limited, 2009.

MLA引文

Boyd, Elaine. Premium: C1 Level (Coursebook). Harlow (England): Pearson education limited, 2009.

警告：這些引文格式不一定是100％准確.