Buchanan, James M., author
Liberty Fund, 1971
Buku Teks
Woll, Peter, author
Little, Brown , 1986
Buku Teks
Agresto, John
Cornell University Press, 1984
Buku Teks
Feith, Herbert
Cornell University Press, 1968
Buku Teks
Feith, Herbert
Equinox, 2007
Buku Teks