APA (7th ed.) Citation

Soars, L. L., Soars, J. J., & Wheeldon, S. S. (2007). New Headway: Elementary workbook with key (3th ed.). University Press.

Chicago Style (17th ed.) Citation

Soars, L. Liz, J. John Soars, and S. Sylvia Wheeldon. New Headway: Elementary Workbook with Key. 3th ed. Oxford: University Press, 2007.

MLA (8th ed.) Citation

Soars, L. Liz, et al. New Headway: Elementary Workbook with Key. 3th ed. University Press, 2007.