Sharp, J. Michael. The Directory of Congressional Voting Scores and Interest Group Ratings. 2 vols. 4th ed.
Washington, D.C.: Congressional Quarterly, c2006.
Columbia Libraries Catalog Call No. JK 1051 .S555 2006
U.S. Congress Votes Database, from the Washington Post
The U.S. Congress Votes Database documents every vote and member of the House and Senate since 1991. Data is pulled from several sources, including the House clerk, the U.S. Senate and the Biographical Directory of the U.S. Congress. For the 112th Congress, users can analyze members and votes by various metrics, including caucus affiliations, 2010 margin of victory, and members endorsed by Tea Party Express or Freedom Works during the 2010 campaign.
Voter Information Services, Inc.
Voting records for members of Congress, and ratings of members of Congress based on their votes on legislation supported or opposed by over 20 special interest/lobbying groups.
Page edited and updated by Julia Robbins, September 2015.