Soars & McCaul. New Headway: Upper-intermediate workbook with key (4th ed.). Oxford University Press.
Chicago Style (17th ed.) CitationSoars and McCaul. New Headway: Upper-intermediate Workbook with Key. 4th ed. United Kingdom: Oxford University Press.
MLA (8th ed.) CitationSoars and McCaul. New Headway: Upper-intermediate Workbook with Key. 4th ed. Oxford University Press.
Warning: These citations may not always be 100% accurate.