Asher, Herbert B.
Presidential elections and American politics: voters, candidates, and campaigns since 1952
Dorsey Press, 1984
Buku Teks SO
Asher, Herbert B.
Presidential elections and American politics: voters, candidates, and campaigns since 1952
Dorsey Press, 1980
Buku Teks SO
Encyclopedia of government and politics; Volume 2
edited by Mary Hawkesworth and Maurice Kogan
Routledge, 1992
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International encyclopedia of government and politics; Volume 2
edited by Frank N. Magill
Toppan, 1996
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Neustadt, Richard E.
Presidential power : the politics of leadership
John Wiley & Sons, 1961
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