APA (7th ed.) Citation

Soars Liz, Soars, J., & Wheeldon, S. (2005). New headway: Upper-intermediate workbook with key (Third edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars Liz, John Soars, and Sylvia Wheeldon. New Headway: Upper-intermediate Workbook with Key. Third edition. Oxford: Oxford University Press, 2005.

MLA (9th ed.) Citation

Soars Liz, et al. New Headway: Upper-intermediate Workbook with Key. Third edition. Oxford University Press, 2005.