(2001). American Headway 2: Workbook cassette. Oxford: Oxford University Press.
Chicago Style aipamenaAmerican Headway 2: Workbook Cassette. Oxford: Oxford University Press, 2001.
MLA aipamenaAmerican Headway 2: Workbook Cassette. Oxford: Oxford University Press, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.