FOROUZAN, B. A., & FEGAN, S. C. (2007). Data communications and networking.-- ed.4 (Ed.4.). McGraw-Hill.

FOROUZAN, Behrouz A., and Sophia Chung FEGAN. Data Communications and Networking.-- Ed.4. Ed.4. Boston: McGraw-Hill, 2007.

FOROUZAN, Behrouz A., and Sophia Chung FEGAN. Data Communications and Networking.-- Ed.4. Ed.4. McGraw-Hill, 2007.