Leitner, Maria and Shapland, Joanna and Wiles, Paul (1993) Drug usage and drugs prevention: the views and habits of the general public. London: Home Office.

Hayhurst, Karen P and Leitner, Maria and Davies, Linda and Flentje, Rachel and Millar, Tim and Jones, Andrew and King, Carlene and Donmall, Micheal and Farrell, Michael and Fazel, Seena and Harris, Rochelle and Hickman, Matthew and Lennox, Charlotte and Mayet, Soraya and Senior, Jane and Shaw, Jennifer (2015) The effectiveness and cost-effectiveness of diversion and aftercare programmes for offenders using class A drugs: a systematic review and economic evaluation. Health Technology Assessment , 19 , (6) .