Cita APA (7a ed.)

Held, G. (1999). Data communications networking devices: Operation, utilization, and LAN and WAN internetworking (4th ed.). John Wiley & Sons.

Cita Chicago Style (17a ed.)

Held, Gilbert. Data Communications Networking Devices: Operation, Utilization, and LAN and WAN Internetworking. 4th ed. Chichester [etc.]: John Wiley & Sons, 1999.

Cita MLA (9a ed.)

Held, Gilbert. Data Communications Networking Devices: Operation, Utilization, and LAN and WAN Internetworking. 4th ed. John Wiley & Sons, 1999.