APA (7th ed.) Citation

Halsall, F. (1996). Data communications, computer networks and open systems (4th ed.). [Publisher not identified].

Chicago Style (17th ed.) Citation

Halsall, Fred. Data Communications, Computer Networks and Open Systems. 4th ed. [Place of publication not identified]: [Publisher not identified], 1996.

MLA (9th ed.) Citation

Halsall, Fred. Data Communications, Computer Networks and Open Systems. 4th ed. [Publisher not identified], 1996.