Walker, Edward Everett, 1900-1974
Government of the United States
Charles Scribner's Sons, 1943
 Buku Teks SO
Zink, Harold
Government of cities in the United States
Macmillan, 1948
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The United States of America : a government by the people
The America University, [Date of publication not identified]
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Holloway, William Vernon
State and local government in the United States
McGraw-Hill , 1951
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The United States government Internet manual
edited by Peggy Garvin
Bernan Press, 2004
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