Campbell, Colin D., author
The Dryden , 1983
Buku Teks
Ritter, Lawrence S., author
Basic Books, 1974
Buku Teks
Mishkin, Frederick S., author
Addison-Wesley, 1997
Buku Teks
Kamerschen, David R., author
South-Western Publishing, 1992
Buku Teks
Luckett, Dudley G., author
McGraw-Hill , 1984
Buku Teks