Cita APA (7a ed.)
Soars, J., Soars, L., & Devoy, J. (1998). New Headway English Course. Upper-Intermediate Workbook with key. Oxford University Press.
Cita Chicago Style (17a ed.)
Soars, John, Liz Soars, y Jo Devoy. New Headway English Course. Upper-Intermediate Workbook with Key. Oxford: Oxford University Press, 1998.
Cita MLA (9a ed.)
Soars, John, et al. New Headway English Course. Upper-Intermediate Workbook with Key. Oxford University Press, 1998.
Precaución: Estas citas no son 100% exactas.