APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Lockley, Paul. Counselling Heroin and Other Drug Users / Paul Lockley. London: Free Association, 1995.

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.