APA引文

(1987). Headway workbook: Upper-intermediate. Oxford: Oxford Univ. Press.

Trích dẫn kiểu Chicago

Headway Workbook: Upper-intermediate. Oxford: Oxford Univ. Press, 1987.

MLA引文

Headway Workbook: Upper-intermediate. Oxford: Oxford Univ. Press, 1987.

警告：這些引文格式不一定是100％准確.