APA (7th ed.) Citation

Penfold, R. A. (1986). An introduction to computer communications. Bernard Babani.

Chicago Style (17th ed.) Citation

Penfold, R. A. An Introduction to Computer Communications. London: Bernard Babani, 1986.

MLA (9th ed.) Citation

Penfold, R. A. An Introduction to Computer Communications. Bernard Babani, 1986.

Warning: These citations may not always be 100% accurate.