Fuori, William M.
Prentice-Hall, 1981
Buku Teks
Kroenke, David M., 1946-
Mitchell Publishing, 1987
Buku Teks
Madura, Jeff
South-Western College, 2001
Buku Teks
Cunningham, William H.
South-Western, 1984
Buku Teks
Pride, William M.
South Western Cengage Learning, 2012
Buku Teks