APA (7th ed.) Citation

Freer, J. R. (1988). Computer communications and networks (1. publ.). Pitman.

Chicago Style (17th ed.) Citation

Freer, John R. Computer Communications and Networks. 1. publ. London: Pitman, 1988.

MLA (9th ed.) Citation

Freer, John R. Computer Communications and Networks. 1. publ. Pitman, 1988.