(1989). Headway workbook: Advanced. Oxford: Oxford Univ. Press.
Trích dẫn kiểu ChicagoHeadway Workbook: Advanced. Oxford: Oxford Univ. Press, 1989.
MLA引文Headway Workbook: Advanced. Oxford: Oxford Univ. Press, 1989.
警告：這些引文格式不一定是100％准確.
APA引文