APA (7th ed.) Citation

Soars, J., Falla, T., & Soars, L. (2009). New headway: Beginner : workbook with key. Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, John, Tim Falla, and Liz Soars. New Headway: Beginner : Workbook with Key. Oxford: Oxford University Press, 2009.

MLA (9th ed.) Citation

Soars, John, et al. New Headway: Beginner : Workbook with Key. Oxford University Press, 2009.