Points of view : readings in American goverment and politics
edited by Robert E. DiClerico, Allan S. Hammock
McGraw-Hill, 1992
 Buku Teks
O`Connor, Robert E.
Politics and Structure: essentials of American National Government
Brooks/Cole, 1982
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Bailey, Stephen K.
America politics and goverment
Voice of America Forum Lectures, 1956
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International Encyclopedia of goverment and politics
"S.Chand ,
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MacDonald, Austin F.
American city goverment and administration
Thomas Y. Crowell , 1951
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