Cita APA (7a ed.)

Soars, J., & Soars, L. New headway English course. Oxford University Press.

Cita Chicago Style (17a ed.)

Soars, John, y Liz Soars. New Headway English Course. Oxford : c2000 [2001 printing]: Oxford University Press.

Cita MLA (8a ed.)

Soars, John, y Liz Soars. New Headway English Course. Oxford University Press.