The H. W. Wilson Company, 1961
Buku Teks
Johnson, Gerald W., author
William Morrow and Company, 1962
Buku Teks
University of Chicago Press, 1975
Buku Teks
Baum, lawrence
A Division of Congressional Quarterly Inc, 1989
Buku Teks
Woodward, Bob, author
Simon and Schuster, 1979
Buku Teks