APA (7th ed.) Citation

Freer, J. R. (1988). Computer communications and networks. Plenum Press.

Chicago Style (17th ed.) Citation

Freer, John R. Computer Communications and Networks. New York [u.a.]: Plenum Press, 1988.

MLA (9th ed.) Citation

Freer, John R. Computer Communications and Networks. Plenum Press, 1988.