APA (7th ed.) Citation

Soars, J., & Soars, L. (2014). New headway: Elementary : workbook with key (4th ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, John, and Liz Soars. New Headway: Elementary : Workbook with Key. 4th ed. Oxford: Oxford University Press, 2014.

MLA (9th ed.) Citation

Soars, John, and Liz Soars. New Headway: Elementary : Workbook with Key. 4th ed. Oxford University Press, 2014.