APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

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