Derek Atkins. (1997). Internet security: Professional reference. Indiana: New Riders.
Dyfyniad Arddull ChicagoDerek Atkins. Internet Security: Professional Reference. Indiana: New Riders, 1997.
Dyfyniad MLADerek Atkins. Internet Security: Professional Reference. Indiana: New Riders, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.