1. World Health Organization. Substance abuse. Available: http://www.who.int/topics/substance_abuse. Accessed 2012 Dec 6.
2. World Health Organization and United Nations Office on Drugs and Crime. Principles of Drug Dependence Treatment, 2008. Available: http://www.unodc.org/documents/drug-treatment/UNODC-WHO-Principles-of-Drug-Dependence-Treatment-March08.pdf. Accessed 2012 Dec 6.
3. Azad India Foundation. Drug abuse in India. Available: http://www.azadindia.org/social-issues/Drug-Abuse-in-India.html Accessed 13/06/12).
4. Women and Drug Abuse: The Problems in India. Available: http://www.unodc.org/pdf/india/publications/women_Book-6-5-03/07_executivesummary.pdf. Accessed 2012 Jun 27.
5. A socio demographic and behavioral profile of heroin users and the risk environment in Quetta, Pakistan;T Zafar;Int J Drug Policy,2002