Comer, D., & Narayanan, M. (2008). Computer networks and internets: With Internet applications (4th ed.). Pearson/Prentice Hall.

Comer, Douglas, and M.S Narayanan. Computer Networks and Internets: With Internet Applications. 4th ed. Upper Saddle River, N.J. ; New Delhi: Pearson/Prentice Hall, 2008.

Comer, Douglas, and M.S Narayanan. Computer Networks and Internets: With Internet Applications. 4th ed. Pearson/Prentice Hall, 2008.