Cita APA (7a ed.)

Soars, L., Soars, J., & Devoy, J. (1998). New Headway English Course: Upper-Intermediate student's Workbook. Oxford University Press.

Cita Chicago Style (17a ed.)

Soars, Liz, John Soars, y Jo Devoy. New Headway English Course: Upper-Intermediate Student's Workbook. Oxford: Oxford University Press, 1998.

Cita MLA (9a ed.)

Soars, Liz, et al. New Headway English Course: Upper-Intermediate Student's Workbook. Oxford University Press, 1998.