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3. UNODC. Global Report on Trafficking in Persons. Geneva: United Nations Publication; 2014. p. 1–90.
4. NCA. Types of human trafficking. National Crime Agency. 2016. Available:
http://www.nationalcrimeagency.gov.uk/crime-threats/human-trafficking/types-of-human-trafficking
. Accessed 7 May 2016.
5. Home Office. Modern Slavery Strategy. London: The Stationery Office; 2014. p. 1–73.