APA (7th ed.) Zitazioa
VIDAL-TRECAN, G., & ET AL. INJECTION RISK BEHAVIORS AT THE FIRST AND AT THE MOST RECENT INJECTIONS AMONG DRUG USERS.
Chicago Style (17th ed.) Zitazioa
VIDAL-TRECAN, G.M, eta ET AL. INJECTION RISK BEHAVIORS AT THE FIRST AND AT THE MOST RECENT INJECTIONS AMONG DRUG USERS.
MLA (9th ed.) Zitazioa
VIDAL-TRECAN, G.M, eta ET AL. INJECTION RISK BEHAVIORS AT THE FIRST AND AT THE MOST RECENT INJECTIONS AMONG DRUG USERS.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.