APA aipamena

(1997). Headway intermediate: Student's book. Oxford: Oxford Univ. Press.

Chicago Style aipamena

Headway Intermediate: Student's Book. Oxford: Oxford Univ. Press, 1997.

MLA aipamena

Headway Intermediate: Student's Book. Oxford: Oxford Univ. Press, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.