APA (7th ed.) Citation

Bourne, S. R. (1982). The UNIX system. Addison-Wesley.

Chicago Style (17th ed.) Citation

Bourne, S. R. The UNIX System. London ; Reading, Mass.: Addison-Wesley, 1982.

MLA (9th ed.) Citation

Bourne, S. R. The UNIX System. Addison-Wesley, 1982.