Cita APA (7a ed.)

Kaplan, J. (1983). The hardest drug: Heroin and public policy. University of Chicago Press.

Cita Chicago Style (17a ed.)

Kaplan, John. The Hardest Drug: Heroin and Public Policy. Chicago [u.a.]: University of Chicago Press, 1983.

Cita MLA (8a ed.)

Kaplan, John. The Hardest Drug: Heroin and Public Policy. University of Chicago Press, 1983.