Cita APA (7th ed.)

Soars, J., & Soars, L. (2009). New Headway: Upper-Intermediate : Student's Book (New Edition.). Oxford University Press.

Cita Chicago (17th ed.)

Soars, John, i Liz Soars. New Headway: Upper-Intermediate : Student's Book. New Edition. New York: Oxford University Press, 2009.

Cita MLA (9th ed.)

Soars, John, i Liz Soars. New Headway: Upper-Intermediate : Student's Book. New Edition. Oxford University Press, 2009.