Soars, L., & Soars, J. (2003). New headway: Intermediate : Student's book (3rd ed.). Oxford University Press.

Soars, Liz, and John Soars. New Headway: Intermediate : Student's Book. 3rd ed. Oxford: Oxford University Press, 2003.

Soars, Liz, and John Soars. New Headway: Intermediate : Student's Book. 3rd ed. Oxford University Press, 2003.