Soars, L., & Soars, J. (1996). New Headway English Course: Intermediate Workbook : with key (4th impression.). Oxford University Press.
Chicago-referens (17:e uppl.)Soars, Liz, och John Soars. New Headway English Course: Intermediate Workbook : With Key. 4th impression. Oxford: Oxford University Press, 1996.
MLA-referens (8:e uppl.)Soars, Liz, och John Soars. New Headway English Course: Intermediate Workbook : With Key. 4th impression. Oxford University Press, 1996.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.