APA (7th ed.) Citation

Sobell, M. G. (1989). A practical guide to the UNIX system (2nd ed.). Benjamin/Cummings.

Chicago Style (17th ed.) Citation

Sobell, Mark G. A Practical Guide to the UNIX System. 2nd ed. Redwood City, Calif.: Benjamin/Cummings, 1989.

MLA (9th ed.) Citation

Sobell, Mark G. A Practical Guide to the UNIX System. 2nd ed. Benjamin/Cummings, 1989.