Rehnquist, William H.
William morrow and company,inc., 1987
Buku Teks
Johnson, Gerald W.
William Morrow and Company, 1962
Buku Teks
edited by Burke Marshall
United States International Communication Agency, 1982
Buku Teks
Agresto, John
Cornell University Press, 1984
Buku Teks
edited by Burke Marshall
National Public Radio, 1982
Buku Teks