Oualline, Steve.
O'Reilly & Associates, 1991
Buku Referensi
Skier, Ken
McGraw-Hill, 1981
Buku Teks
Katzan, Harry, Jr., author
Auerbach, 1973
Buku Teks
Henderson, Peter, author
Prentice-Hall, 1980
Buku Teks
Longkutoy, John J., author
Mutiara, 1980
Buku Teks