University of Notre Dame Press, 1979
Buku Teks
Lippmann, Walter
Little, Brown, 1943.
Buku Teks
Divine, Robert A.
New Viewpoints, 1974
Buku Teks
edited by Barry M. Rubin and Elizabeth P. Spiro ; with a foreword by Muriel S. Humphrey
Westview Press, 1979
Buku Teks
Magdoff, Harry
Modern Reader Paperbacks, 1969
Buku Teks