APA (7th ed.) Citation
Soars, L., Soars, J., & Wheeldon, S. (2006). New Headway: Elementary. Workbook with key. The third edition. Oxford University Press.
Chicago Style (17th ed.) Citation
Soars, Liz, John Soars, and Sylvia Wheeldon. New Headway: Elementary. Workbook with Key. The Third Edition. Oxford: Oxford University Press, 2006.
MLA (9th ed.) Citation
Soars, Liz, et al. New Headway: Elementary. Workbook with Key. The Third Edition. Oxford University Press, 2006.
Warning: These citations may not always be 100% accurate.