edited by Robert W. Tucker, Charles B. Keely, and Linda Wrigley
Westview Press, 1990
Buku Teks SO
Buku Teks
edited by Congressional Quarterly
Congresseional Quarterly, 1986
Buku Teks SO
edited by Barry M. Rubin and Elizabeth P. Spiro ; with a foreword by Muriel S. Humphrey
Westview Press, 1979
Buku Teks
Lippmann, Walter
Little, Brown, 1943.
Buku Teks SO