Barnet, Richard J., author
Simon and Schuster, 1981
Buku Teks
Hoffman, Frederick J.
The Free Press, 1962
Buku Teks
McConnell, Grant, author
Alfred A. Knopf, 1967
Buku Teks
Lake, Anthony, author
Little, Brown and Company, 2000
Buku Teks
Galbraith, John Kenneth, 1908-2006, author
Houghton Miffiln, 1952
Buku Teks