APA (7th ed.) Citation

Held lhGilbert. Voice and data internetworking with IP and frame relay.

Chicago Style (17th ed.) Citation

Held lhGilbert. Voice and Data Internetworking with IP and Frame Relay. San Franciso lbMcGraw-hill lc1998.

MLA (9th ed.) Citation

Held lhGilbert. Voice and Data Internetworking with IP and Frame Relay.

Warning: These citations may not always be 100% accurate.