APA (7th ed.) Citation

Soars, L., Soars, J., & Wheeldon, S. (2006). New headway: Elementary workbook with key (Third edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, Liz, John Soars, and Sylvia Wheeldon. New Headway: Elementary Workbook with Key. Third edition. Oxford: Oxford University Press, 2006.

MLA (9th ed.) Citation

Soars, Liz, et al. New Headway: Elementary Workbook with Key. Third edition. Oxford University Press, 2006.