Liz, McCaul, J., & Soars, J. (2019). New headway: Pre-intermediate. workbook with key (Fifth edition.). Oxford University Press.
Chicago Style (17th ed.) ZitazioaLiz, Jo McCaul, eta John Soars. New Headway: Pre-intermediate. Workbook with Key. Fifth edition. Oxford: Oxford University Press, 2019.
MLA (9th ed.) ZitazioaLiz, et al. New Headway: Pre-intermediate. Workbook with Key. Fifth edition. Oxford University Press, 2019.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.