Cita APA (7a ed.)

Sobell, M. G. (1984). A practical guide to the UNIX system. The Benjamin Cummings.

Cita Chicago Style (17a ed.)

Sobell, Mark G. A Practical Guide to the UNIX System. Menlo Park: The Benjamin Cummings, 1984.

Cita MLA (9a ed.)

Sobell, Mark G. A Practical Guide to the UNIX System. The Benjamin Cummings, 1984.