Perron, Robert, author
Information Sciences Inc., 1981
Buku Teks
Whittington, R.P., author
Clarendon Press , 1988
Buku Teks
Teorey, Toby J.
Englewood Cliffs, NJ: Prentice-Hall, 1982
Buku Teks
Olle, T. William, author
John Wiley & Sons, 1978
Buku Teks
Curtice, Robert M., author
Van Nostrand Reinhold, 1982
Buku Teks