APA Citatie

Soars, L., Devoy, J., & Soars, J. (1998). New headway english course: Upper - intermediate Workbook. New York: Oxford University Press.

Chicago Style citaat

Soars, Liz, Jo Devoy, en John Soars. New Headway English Course: Upper - Intermediate Workbook. New York: Oxford University Press, 1998.

MLA citatie

Soars, Liz, Jo Devoy, en John Soars. New Headway English Course: Upper - Intermediate Workbook. New York: Oxford University Press, 1998.