The Presidents : a reference history
editor, Henry F. Graff
Charles Scribner's Sons , 1996
 Buku Referensi
Corwin, Edward S., author
The President : office and powers, 1787-1984 : history and analysis of practice and opinion
New York University Press, 1957
 Buku Teks
Pious, Richard M
The American presidency/ Richard M.
Basic Books, 1944
 Buku Teks
Politics and the Oval Office: towards presidential governance
edited by Arnold J. Meltsner
Institute for Contemporary Studies, 1981
 Buku Teks
Kessel, John H., author
Presidential campaign politics: coalition strategies and citizen response
Dorsey Press, 1980
 Buku Teks
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