APA (7th ed.) Citation

Soars, L., Sayer, M., & Soars, J. (2003). New headway: Intermediate. Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, Liz, Mike Sayer, and John Soars. New Headway: Intermediate. Oxford: Oxford University Press, 2003.

MLA (9th ed.) Citation

Soars, Liz, et al. New Headway: Intermediate. Oxford University Press, 2003.