Armfield, F. L. (2011). Eugene Kinckle Jones: The National Urban League and Black social work, 1910-40. University of Illinois Press.
Chicago-referens (17:e uppl.)Armfield, Felix L. Eugene Kinckle Jones: The National Urban League and Black Social Work, 1910-40. Urbana: University of Illinois Press, 2011.
MLA-referens (9:e uppl.)Armfield, Felix L. Eugene Kinckle Jones: The National Urban League and Black Social Work, 1910-40. University of Illinois Press, 2011.
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