APA aipamena

Owen,Roger. (1992). BBC: Business English. HCM.: HCM.

Chicago Style aipamena

Owen,Roger. BBC: Business English. HCM.: HCM, 1992.

MLA aipamena

Owen,Roger. BBC: Business English. HCM.: HCM, 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.