Soars, J., & Soars, L. (2004). New headway English course: Elementary Student's book. Oxford University Press.

Soars, John, and Liz Soars. New Headway English Course: Elementary Student's Book. New York: Oxford University Press, 2004.

Soars, John, and Liz Soars. New Headway English Course: Elementary Student's Book. Oxford University Press, 2004.