APA (7th ed.) Zitazioa
Irvine, M. (1999). Commercially Speaking. Workbook (1a. ed.). Oxford University Press.
Chicago Style (17th ed.) Zitazioa
Irvine, Mark. Commercially Speaking. Workbook. 1a. ed. Buenos Aires: Oxford University Press, 1999.
MLA (9th ed.) Zitazioa
Irvine, Mark. Commercially Speaking. Workbook. 1a. ed. Oxford University Press, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.