Correspondence published in The Booker T. Washington Papers. Introduction to the letter explores Gladden as a leader of Social Gospel and his influence on W. E. B. DuBois and Booker T. Washington.
http://womhist.binghamton.edu/webdbtw/doc11.htm
Sermon delivered on November 16, 2003 by Richard R. Kurrasch, Interim Senior Minister of the First Congregational Church in Los Angeles. PDF Format.
http://www.fccla.org/sermons/11-16-03.pdf