APA (7th ed.) Citation

Wittenberg, N. (2009). Understanding voice over IP technology. Delmar Cengage Learning.

Chicago Style (17th ed.) Citation

Wittenberg, Nicholas. Understanding Voice over IP Technology. Clifton Park, NY: Delmar Cengage Learning, 2009.

MLA (8th ed.) Citation

Wittenberg, Nicholas. Understanding Voice over IP Technology. Delmar Cengage Learning, 2009.

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