APA引文

Nicholas Sampson. (1997). English in focus; Level B. Tp. HCM: Nxb. Tp. HCM.

Trích dẫn kiểu Chicago

Nicholas Sampson. English in Focus; Level B. Tp. HCM: Nxb. Tp. HCM, 1997.

MLA引文

Nicholas Sampson. English in Focus; Level B. Tp. HCM: Nxb. Tp. HCM, 1997.

警告：这些引文格式不一定是100％准确.