1. World Prison Population List;Walmsley,2016
2. Invisible Men Mass: Incarceration and the Myth of Black Progress;Pettit,2012
3. Kaeble D, Glaze LE. Correctional Populations in the United States, 2015. 2016. Department of Justice Report NCJ 250374. Available at: https://www.bjs.gov/index.cfm?ty=pbdetail&iid=5870. Accessed April 19, 2017.
4. Minton TD, Zeng Z. Jail Inmates in 2015. 2016. Department of Justice Report NCJ 250394. Available at: https://www.bjs.gov/index.cfm?ty=pbdetail&iid=5872. Accessed April 19, 2017.
5. Carson EA, Anderson E. Prisoners in 2015. 2016. Department of Justice Report NCJ 250229. Available at: https://www.bjs.gov/index.cfm?ty=pbdetail&iid=5871. Accessed April 19, 2017.