"The Papers of Martin Luther King, Jr., Volume IV: Symbol of the Movement, January 1957-December 1958". Book by Martin Luther King, Clayborne Carson, Peter Holloran, Ralph Luker, Penny A. Russell (University of California Press), p. 211, 1992.
Remark during testimony of Floyd McKissick before a Senate subcommittee of which Kennedy was a member (December 8, 1966); reported in "Federal Role in Urban Affairs", hearings before the Subcommittee on Executive Reorganization of the Committee on Government Operations, United States Senate, 89th Congress, 2d session, part 11, (p. 2312), 1967.
Jimmy Earl Carter “Public Papers of the Presidents of the United States, Jimmy Carter, 1978, Book 1: January 1 to June 30, 1978”, Government Printing Office