Here is a list of some helpful links regarding human trafficking and exploitation both in Cambodia and internationally:

Cambodian Human Trafficking Resources

Networks in Cambodia

ChildSafe Cambodia - Working to prevent trafficking of children in Cambodia: http://www.childsafe-international.org/cambodia/cscambodia.asp
COSECAM - NGO Coalition to Address Sexual Exploitation of
Children in Cambodia - www.cosecam.org
ECPAT Cambodia – End Child Prostitution, Abuse and Trafficking in Cambodia - http://www.ecpatcambodia.org
UNIAP-Cambodia – United Nations Inter Agency Project on Human Trafficking in the Great Mekong Sub-Region – www.no-trafficking.org

International Human Trafficking Resources

ECPAT International - End Child Prostitution, Child Pornography and Trafficking of Children for Sexual Purposes - www.ecpat.net
HumanTrafficking.org – A Web Resource for Combating Human Trafficking: http://www.humantrafficking.org/
Not for Sale Campaign – End Human Trafficking and Slavery: http://www.notforsalecampaign.org/
UN.GIFT - United Nations Global Initiative to Fight Human Trafficking: http://www.ungift.org/
Polaris Project – Combating Trafficking and Modern-Day Slavery - http://www.polarisproject.org/
Stop Exploitation Now
Redlight Children – Campaign Against Child Sexploitation: http://www.redlightchildren.org/
Stop Exploitation Now! - Working to stop exploitation and abuse in Southeast Asia: http://www.stopexploitationnow.org

Recommended reading

US Department of State, Trafficking In Persons Report 2009 found at http://www.state.gov/g/tip/rls/tiprpt/2009/
Prostitution, Trafficking, and Traumatic Stress, a book by Melissa Farley
Sex Slaves: The Trafficking of Women in Asia, a book by Louise Brown
Not for Sale: The Return of the Global Slave Trade - and How We Can Fight It, a book by David Batstone