1. Paul Wagner and Andrew Walsh. 2016. States of Incarceration: The Global Context 2016. Press Release (16 January 2016). Retrieved July 1 2017 from https://www.prisonpolicy.org/global/2016.html Paul Wagner and Andrew Walsh. 2016. States of Incarceration: The Global Context 2016. Press Release (16 January 2016). Retrieved July 1 2017 from https://www.prisonpolicy.org/global/2016.html
2. Institute for Criminal Policy Research. 2016. World Prison Brief Data on Nigeria. Retrieved July 1 2017 from http://www.prisonstudies.org/country/nigeria Institute for Criminal Policy Research. 2016. World Prison Brief Data on Nigeria. Retrieved July 1 2017 from http://www.prisonstudies.org/country/nigeria
3. Sarah Anderson and Carly Cairns. 2011. The Social Care Needs of Short-Sentence Prisoners: A literature review commissioned by the North-East Public Health Observatory. Revolving Doors Agency 1--55. www.revolving-doors.org.uk. Sarah Anderson and Carly Cairns. 2011. The Social Care Needs of Short-Sentence Prisoners: A literature review commissioned by the North-East Public Health Observatory. Revolving Doors Agency 1--55. www.revolving-doors.org.uk.
4. Projecting health