1. Stritt SB. Estimating the value of social services provided by faith-based organizations in the United States. Nonprofit Volunt Sect Q. 2008;37(4):730–42.
2. Harrelson S. Mavericks or allies: the role of faith-based organizations in the anti-trafficking movement. In: Second annual interdisciplinary conference on human trafficking. 2010. Available online at: http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1018&context=humtrafconf2 . Accessed 12 Apr 2016.
3. Federal Strategic Action Plan on Services for Victims of Human Trafficking in the United States. 2013–2017. Available online at: http://www.ovc.gov/pubs/FederalHumanTraffickingStrategicPlan.pdf . Accessed 5 Apr 2016.
4. Purekal CL. Christianity and sex trafficking: the role of faith-based service providers in the United States. 2012. Available online at: http://conservancy.umn.edu/bitstream/handle/11299/123580/Purekal_Christianity%20and%20Sex%20Trafficking%20The%20Role%20of%20Faith%20Based%20Service%20Providers%20in%20the%20United%20States.pdf;sequence=1 . Accessed 12 Apr 2016.
5. Al-Islam.org. The thirtieth greater sin: not helping the oppressed. 2016. http://www.al-islam.org/greater-sins-volume-2-ayatullah-sayyid-abdul-husayn-dastghaib-shirazi/thirtieth-greater-sin-not . Accessed 9 Mar 2016.