Sequeira, Anthony, author
Cisco Press, 2013
Buku Teks
edited by Harold F. Tipton
CRC Press, 2012
Buku Teks
Neal, Patrick Terrence
McGraw-Hill, 1999
Buku Referensi
Miller, David R., author
Wiley, 2011
Buku Teks
Sharpe, Pamela J., author
Barron's, 2001
Buku Teks