Soars, L., & Soars, J. (1998). New Headway English Course, Upper-Intermediate: Workbook. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoSoars, Liz, và John Soars. New Headway English Course, Upper-Intermediate: Workbook. Oxford: Oxford University Press, 1998.
MLA引文Soars, Liz, và John Soars. New Headway English Course, Upper-Intermediate: Workbook. Oxford: Oxford University Press, 1998.
警告：這些引文格式不一定是100％准確.