APA aipamena

(1991). Headway teacher's book: Pre-intermediate. New York 0: Oxford University Press.

Chicago Style aipamena

Headway Teacher's Book: Pre-intermediate. New York 0: Oxford University Press, 1991.

MLA aipamena

Headway Teacher's Book: Pre-intermediate. New York 0: Oxford University Press, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.