APA

Held G., .Next-Generation Modems:A Professional Guide To DSL And Cable Modems. New York: John Wiley & Sons,Inc.

Chicago

Held Gilbert, .Next-Generation Modems:A Professional Guide To DSL And Cable Modems. New York: John Wiley & Sons,Inc.

Harvard

Held G., .Next-Generation Modems:A Professional Guide To DSL And Cable Modems. New York: John Wiley & Sons,Inc.

MLA

Held Gilbert, .New York: John Wiley & Sons,Inc. .