U.S. Department of State, Office to Monitor and Combat Trafficking in Persons
http://www.state.gov/g/tip

U.S. Department of Health and Human Services, Campaign to Rescue and Restore Victims of Human Trafficking
http://www.acf.hhs.gov/trafficking/index.html

U.S. Department of Justice
http://www.usdoj.gov/whatwedo/whatwedo_ctip.html
http://www.ovc.gov/help/tip.htm
http://www.usdoj.gov/criminal/ceos/trafficking.html

Federal Bureau of Investigation, Investigative Programs, Crimes Against Children
http://www.fbi.gov/hq/cid/cac/crimesmain.htm

National Center for Missing and Exploited Children
http://www.ncmec.org

Polaris Project
http://www.polarisproject.org

United Nations Office on Drugs and Crime
http://www.unodc.org/unodc/en/human-trafficking/what-is-human-traffickin...

United Nations Optional Protocol to the Convention on the Rights of the Child on Sale of Children, Child Prostitution and Child Pornography
http://www2.ohchr.org/english/law/crc-sale.htm