APA (7th ed.) Citation

Soars, J., & Soars, L. (2009). New Headway: Upper-Intermediate : Worbook with key (New Edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, John, and Liz Soars. New Headway: Upper-Intermediate : Worbook with Key. New Edition. New York: Oxford University Press, 2009.

MLA (9th ed.) Citation

Soars, John, and Liz Soars. New Headway: Upper-Intermediate : Worbook with Key. New Edition. Oxford University Press, 2009.