Cita APA (7a ed.)

Soars, L., Soars, J., & Falla, T. (2008). New headway: Advanced. Workbook with key. Oxford University Press.

Cita Chicago Style (17a ed.)

Soars, Liz, John Soars, y Tim Falla. New Headway: Advanced. Workbook with Key. Oxford [etc.]: Oxford University Press, 2008.

Cita MLA (9a ed.)

Soars, Liz, et al. New Headway: Advanced. Workbook with Key. Oxford University Press, 2008.