Cita APA (7a ed.)

Simpson, D. D., & Marsh, K. L. (1986). Relapse and recovery among opioid addicts 12 years after treatment. [s.n.].

Cita Chicago Style (17a ed.)

Simpson, D. Dwayne, y Kerry L. Marsh. Relapse and Recovery Among Opioid Addicts 12 Years After Treatment. [S.l.]: [s.n.], 1986.

Cita MLA (9a ed.)

Simpson, D. Dwayne, y Kerry L. Marsh. Relapse and Recovery Among Opioid Addicts 12 Years After Treatment. [s.n.], 1986.