Soars, J., & Soars, L. (2003). New headway: Advanced Student's book. Oxford University Press.

Soars, John, and Liz Soars. New Headway: Advanced Student's Book. New York: Oxford University Press, 2003.

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