Naunton, J. (2000). Head for business: Intermediate class cassette. Oxford: Open University Press.
Chicago Style aipamenaNaunton, Jon. Head for Business: Intermediate Class Cassette. Oxford: Open University Press, 2000.
MLA aipamenaNaunton, Jon. Head for Business: Intermediate Class Cassette. Oxford: Open University Press, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.