Soars, L., & Liz & John Soars with Jop Devoy. (1998). New Headway English Course: Upper-intermediate (Workbook without key). Oxford: Oxford University Press.
استشهاد بنمط شيكاغوSoars, Liz, و Liz & John Soars with Jop Devoy. New Headway English Course: Upper-intermediate (Workbook Without Key). Oxford: Oxford University Press, 1998.
MLA استشهادSoars, Liz, و Liz & John Soars with Jop Devoy. New Headway English Course: Upper-intermediate (Workbook Without Key). Oxford: Oxford University Press, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.