APA (7th ed.) Zitazioa
HUGHES, R. (2000). DRUG INJECTORS AND THE CLEANING OF NEEDLES AND SYRINGES.
Chicago Style (17th ed.) Zitazioa
HUGHES, R.A. DRUG INJECTORS AND THE CLEANING OF NEEDLES AND SYRINGES. 2000.
MLA (9th ed.) Zitazioa
HUGHES, R.A. DRUG INJECTORS AND THE CLEANING OF NEEDLES AND SYRINGES. 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.