Sayre, Wallace S.
American government
Barnes & Noble, 1964
Buku Teks
Posey, Rollin Bennett
American government
Littlefield, Adam, 1958
Buku Teks
Ferguson, John H.
The American system of government
McGraw-Hill, 1947
Buku Teks
Ferguson, John H.
The American system of government
McGraw-Hill, 1981
Buku Teks
Ferguson, John H.
The American federal government
McGraw-Hill, 1981
Buku Teks