Brubaker, Herb. Extremism in America Today: An interview with Clifford P. Case, Morris B. Abram [and] Robert F. Kennedy. New York: American Jewish Committee & Institute of Human Relations, 1966.
Case, Clifford. "Changing Role of Congress: The Growing Concern with the Legislative Process." George Washington Law Review 32 (June 1964): 929-31
Case II, Clifford P. Papers. Special Collections and University Archives, Rutgers University Libraries. New Brunswick, NJ.
Case, Clifford P. Commercials. 1972. University of Oklahoma Political Commercial Archive, Norman, OK.
Case, Clifford. Correspondence and briefing papers, 1974-1977. Gerald R. Ford Library, Ann Arbor, MI.
Case, Clifford. Interview. Transcript. Meet the Press. NBC Television (August 3, 1958). St. Mary's University Libraries, San Antonio, TX.
Case, Clifford P. Interview. 1979. Reminiscences, including Jewish and other lobbies, sale of weapons to Israel, and impressions of J. William Fulbright and Henry Kissinger. Columbia University Oral History Project, New York, NY.
Case, Clifford P. 1979. Interview. Transcript. March 1. Lyndon Baines Johnson Library, Austin, TX.
Case III, Clifford P. 2005. Interview by William R. Fernekes. Tape recording. July 27, New York, NY. Permission required to cite.
Case, Ruth. Papers. Courtesy of the Case Family.
Holt, Ann. 2005. Interview by William R. Fernekes. Tape recording. August 20, Clinton, NJ. Permission required to cite.
The New York Times. "Case Resigns Post: Jersey Representative Quitting to Head Fund for the Republic," August 15, 1953.
The New York Times. "Young Republicans Bolt House Rule: Thirty-nine Form Group to Give Own Views Regardless of Party Leaders," December 1, 1945.
U.S. Congress. Senate. Committee on the District of Columbia. Authorizing the Financing of a Program of Public Works Construction for the District of Columbia. Washington, DC: GPO, 1954.
U.S. Congress. Senate. Committee on Foreign Relations, United Nations Conference on the Human Environment. Report to the Senate by Claiborne Pell and Clifford Case. Washington, DC: GPO, 1973.
Weaver, Mary Jane. 2005. Interview by William R. Fernekes. Tape recording. September 8, Rahway, NJ. Permission required to cite.
Zill, Ann. Clifford P. Case. Citizens Look at Congress, vol.1. Washington, DC: Ralph Nader Congress Project, 1972.