Buchanan, James M., author
Liberty Fund, 2001
Buku Referensi
Galbraith, John Kenneth, 1908-2006, author
Houghton Mifflin, 1979
Buku Teks
Greenspan, Alan
Allen Lane, 2007
Buku Teks
Buchanan, James M., author
Liberty Fund, Inc., 1999
Buku Referensi
Buchanan, James M., author
Liberty Fund, 1999
Buku Referensi