APA (7th ed.) Citation

Soars, J., & Soars, L. (2003). New Headway: Intermediate Workbookbook with key (New Edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, John, and Liz Soars. New Headway: Intermediate Workbookbook with Key. New Edition. New York: Oxford University Press, 2003.

MLA (9th ed.) Citation

Soars, John, and Liz Soars. New Headway: Intermediate Workbookbook with Key. New Edition. Oxford University Press, 2003.