APA Style

Fegan, S, C., Forouzan, B, A. (2007). Data communications and networking. Fourth Edition (Fourth Edition). New York: Mc Graw Hill.

MLA Style

Fegan, Sophia, Chung., Forouzan, Behrouz, A. "Data communications and networking. Fourth Edition". Fourth Edition New York: Mc Graw Hill, 2007. Text.