APA (7th ed.) Citation

Soars, J. J., & Soars, L. L. (2007). New Headway. English Course: Workbook with key. University Press.

Chicago Style (17th ed.) Citation

Soars, J. John, and L. Liz Soars. New Headway. English Course: Workbook with Key. Oxford: University Press, 2007.

MLA (8th ed.) Citation

Soars, J. John, and L. Liz Soars. New Headway. English Course: Workbook with Key. University Press, 2007.