APA aipamena

Soars, L., & Soars, J. (2004). American headway: Workbook. Oxford: Oxford Univ. Press.

Chicago Style aipamena

Soars, Liz, và John Soars. American Headway: Workbook. Oxford: Oxford Univ. Press, 2004.

MLA aipamena

Soars, Liz, và John Soars. American Headway: Workbook. Oxford: Oxford Univ. Press, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.