Mike Millmore, Philip Lewis, Mark Saunders, Adrian Thornhill, Trevor Morrow
Prentice-Hall, 2007
Buku Teks
David, Fred R., author
Pearson, 2009
Buku Teks
Craig, James C.
Elex media komputindo , 1996
Buku Teks
Hill, Charles W. L., author
Houghton Miffinn, 1989
Buku Teks
Cleland, David I., author
John Wiley & Sons, 1996
Buku Teks