Cita APA (7th ed.)
O'BRIEN, C., & ET AL. SUBSTANCE ABUSE TREATMENT RESEARCH CENTER PHILADELPHIA VA MEDICAL CENTER AND THE UNIVERSITY OF PENNSYLVANIA.
Cita Chicago (17th ed.)
O'BRIEN, C.P, i ET AL. SUBSTANCE ABUSE TREATMENT RESEARCH CENTER PHILADELPHIA VA MEDICAL CENTER AND THE UNIVERSITY OF PENNSYLVANIA.
Cita MLA (9th ed.)
O'BRIEN, C.P, i ET AL. SUBSTANCE ABUSE TREATMENT RESEARCH CENTER PHILADELPHIA VA MEDICAL CENTER AND THE UNIVERSITY OF PENNSYLVANIA.
Atenció: Aquestes cites poden no estar 100% correctes.