Moore, John A.
The pursuit of happiness: goverment and politics in America
Macmillan, 1985
Buku Teks SO
Griffith, Ernest S.
The America system of goverment
London Methuen & Co. 1967,
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International Encyclopedia of goverment and politics
"S.Chand ,
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Points of view : readings in American goverment and politics
edited by Robert E. DiClerico, Allan S. Hammock
McGraw-Hill, 1992
Buku Teks SO
O`Connor, Robert E.
Politics and structure: essentials of American national goverment
Brooks/Cole, 1979
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