APA aipamena

John Soars. (1987). Headway: Intermediate workbook. London: Oxford Univ. Press.

Chicago Style aipamena

John Soars. Headway: Intermediate Workbook. London: Oxford Univ. Press, 1987.

MLA aipamena

John Soars. Headway: Intermediate Workbook. London: Oxford Univ. Press, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.