APA aipamena

World Health Organization. (1997). Guide to drug abuse epidemiology: Pre-publication version. World Health Organization.

Chicago Style aipamena

World Health Organization. Guide to Drug Abuse Epidemiology: Pre-publication Version. Geneva: World Health Organization, 1997.

MLA aipamena

World Health Organization. Guide to Drug Abuse Epidemiology: Pre-publication Version. World Health Organization, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.