APA aipamena

(2001). American headway 1: Workbook. Oxford: Oxford University Press.

Chicago Style aipamena

American Headway 1: Workbook. Oxford: Oxford University Press, 2001.

MLA aipamena

American Headway 1: Workbook. Oxford: Oxford University Press, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.