Kotz, Nick (2005). "14. Another Martyr". Judgment days : Lyndon Baines Johnson, Martin Luther King, Jr., and the laws that changed America. Boston: Houghton Mifflin. p. 417. ISBN0-618-08825-3.
Maddison, Catherine (2007). "'In Chains 400 Years ... And Still hi Chains in DC!' The 1966 Free DC Movement and the Challenges of Organizing in the City". Journal of American Studies. 2007: 169. doi:10.1017/S0021875806002799. S2CID143498079 – via JSTOR.
Maddison, Catherine (2007). "'In Chains 400 Years ... And Still hi Chains in DC!' The 1966 Free DC Movement and the Challenges of Organizing in the City". Journal of American Studies. 2007: 169. doi:10.1017/S0021875806002799. S2CID143498079 – via JSTOR.