Soars, J., & Soars, L. (2003). New Headway: Intermediate student's book (Third ed.). Oxford University Press.

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

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