Bebbington, P. E. (1976) The efficacy of Alcoholics Anonymous: the elusiveness of hard data. British Journal of Psychiatry, 128, 572–580.
Brown, R. I. F. (1985) The effectiveness of Gamblers Anonymous. In The Gambling Studies: Proceedings of the Sixth National Conference on Gambling and Risk Taking, Vol. 5, The Phenomenon of Pathological Gambling (ed. Eadington, W. R.). Reno: Bureau of Business and Economic Administration, University of Nevada.
Brown, R. I. F. (1986) Dropouts and continuers in Gamblers Anonymous: 1. Life-context and other factors. Journal of Gambling Behavior, 2, 130–140.
Brown, R. I. F. (1987) Dropouts and continuers in Gamblers Anonymous: 4. Evaluation and summary. Journal of Gambling Behavior, 3, 202–210.
Leach, B. (1973) Does Alcoholics Anonymous really work? In Alcoholism: Progress in Research and Treatment (eds Bourne, P. & Fox, R.). New York: Academic Press.
Polich, J. M., Armor, J. D. & Braiker, H. B. (1981) The Course of Alcoholism, Four Years After Treatment. New York: Wiley.