APA引文

(1999). Headway workbook: Elementary. Oxford: Oxford University Press.

Trích dẫn kiểu Chicago

Headway Workbook: Elementary. Oxford: Oxford University Press, 1999.

MLA引文

Headway Workbook: Elementary. Oxford: Oxford University Press, 1999.

警告：這些引文格式不一定是100％准確.