John Ferejohn, Jack N. Rakove, Jonathan Riley
Cambridge University Press, 2001
Buku Teks
Graber, Mark A., author
Oxford University Press, 2015
Buku Teks
Tribe, Laurence H., author
Foundation Press, 1988
Buku Teks
American Enterprise Institute for Public Policy Research, 1987
Buku Teks
Cooley, Thomas M.
Little, Brown and Company, 1898
Buku Teks