APA (7th ed.) Citation

Soars, L., & Soars, J. (1996). New headway English course: Intermediate student's book. Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, Liz, and John Soars. New Headway English Course: Intermediate Student's Book. Oxford: Oxford University Press, 1996.

MLA (9th ed.) Citation

Soars, Liz, and John Soars. New Headway English Course: Intermediate Student's Book. Oxford University Press, 1996.