Cita APA (7a ed.)

Soars, L., Soars, J., & Devoy, J. (2008). New headway: English course : upper-intermediate. Workbook with key (1st published, 11th impression.). Oxford University Press.

Cita Chicago Style (17a ed.)

Soars, Liz, John Soars, y Jo Devoy. New Headway: English Course : Upper-intermediate. Workbook with Key. 1st published, 11th impression. Oxford [etc.]: Oxford University Press, 2008.

Cita MLA (9a ed.)

Soars, Liz, et al. New Headway: English Course : Upper-intermediate. Workbook with Key. 1st published, 11th impression. Oxford University Press, 2008.