edited by Robert W. Tucker, Charles B. Keely, and Linda Wrigley
Westview Press, 1990
Buku Teks
edited by Max F. Millikan
Little, Brown, 1961
Buku Teks
edited by Max F. Millikan and Donald L.M. Blackmer
Little, Brown, 1961
Buku Teks
Congresseional Quarterly, 1986
Buku Teks
Magdoff, Harry, author
Modern Reader Paperbacks, 1969
Buku Teks