1. Addiction Research Foundation. (1998). Let’em go: The street involved youth harm reduction project experience. Toronto: Addiction Research Foundation.
2. American Anthropological Association. Code of ethics of the American Anthropological Association (retrieved 9 June 2004 from http://www.aaanet.org/committees/ethics/ethcode.html).
3. Snowball sampling problems and techniques of chain-referral sampling;Biernacki;Sociological Methods and Research,1981
4. Harnessing peer networks as an instrument for AIDS prevention: Results from a peer driven-intervention;Broadhead;Public Health Reports,1998
5. What is participatory research?;Cornwall;Social Science and Medicine,1995