Dietrich, Joseph R.
Addison-Wesley, 1958
Buku Teks
Johnson, Walter H., author
Wiley blackwell, 2014
Buku Teks
Gill, Philip E.
Academic Press , 1981
Buku Teks
Kurtz, David L., author
Business Publications, Inc., 1982
Buku Teks
Barney, Jay B.
Houghton Miffiln, 1992
Buku Teks