Sayre, Wallace S.
American government
Barnes & Noble, 1964
 Buku Teks SO
Posey, Rollin Bennett
American government
Littlefield, Adam, 1958
 Buku Teks SO
Bailey, Stephen K.
Government in America
Henry Holt, 1957
 Buku Teks SO
OConnor, Karen
American government
Addison Wesley Longman, 2001
 Buku Teks
Griffith, Ernest S.
The American system of government
Frederick A. Praeger, 1954
 Buku Teks SO