Soars, L., & Liz & John Soars with Jop Devoy. (1998). New Headway English Course: Upper-intermediate (Workbook without key). Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoSoars, Liz, và Liz & John Soars with Jop Devoy. New Headway English Course: Upper-intermediate (Workbook Without Key). Oxford: Oxford University Press, 1998.
MLA引文Soars, Liz, và Liz & John Soars with Jop Devoy. New Headway English Course: Upper-intermediate (Workbook Without Key). Oxford: Oxford University Press, 1998.
警告：这些引文格式不一定是100％准确.