Cita APA (7a ed.)

Lockley, P. (1995). Counselling heroin and other drug users. Free Association Books.

Cita Chicago Style (17a ed.)

Lockley, Paul. Counselling Heroin and Other Drug Users. London [u.a.]: Free Association Books, 1995.

Cita MLA (9a ed.)

Lockley, Paul. Counselling Heroin and Other Drug Users. Free Association Books, 1995.