APA (7th ed.) Citation

Soars, L., & Soars, J. (2003). New Headway: Intermediate workbook with key (Third edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, Liz, and John Soars. New Headway: Intermediate Workbook with Key. Third edition. Oxford: Oxford University Press, 2003.

MLA (8th ed.) Citation

Soars, Liz, and John Soars. New Headway: Intermediate Workbook with Key. Third edition. Oxford University Press, 2003.