Cita APA (7a ed.)

Soars, J., Falla, T., & Soars, L. (2009). New headway: Beginner : workbook with key. Oxford University Press.

Cita Chicago Style (17a ed.)

Soars, John, Tim Falla, y Liz Soars. New Headway: Beginner : Workbook with Key. Oxford: Oxford University Press, 2009.

Cita MLA (9a ed.)

Soars, John, et al. New Headway: Beginner : Workbook with Key. Oxford University Press, 2009.