APA (7th ed.) Citation

Sobell Mark G. (1984). A practical guide to the UNIX System.

Chicago Style (17th ed.) Citation

Sobell Mark G. A Practical Guide to the UNIX System. 1984.

MLA (8th ed.) Citation

Sobell Mark G. A Practical Guide to the UNIX System. 1984.

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