Cita APA (7th ed.)
KRAL, A., & ET AL. (1999). RISK FACTORS AMONG IDUs WHO GIVE INJECTIONS TO OR RECEIVE INJECTIONS FROM OTHER DRUG USERS.
Cita Chicago (17th ed.)
KRAL, A.H, i ET AL. RISK FACTORS AMONG IDUs WHO GIVE INJECTIONS TO OR RECEIVE INJECTIONS FROM OTHER DRUG USERS. 1999.
Cita MLA (9th ed.)
KRAL, A.H, i ET AL. RISK FACTORS AMONG IDUs WHO GIVE INJECTIONS TO OR RECEIVE INJECTIONS FROM OTHER DRUG USERS. 1999.
Atenció: Aquestes cites poden no estar 100% correctes.