APA (7th ed.) Citation

Christian, K. (1994). The UNIX operating system (3rd ed.). John Wiley.

Chicago Style (17th ed.) Citation

Christian, Kaare. The UNIX Operating System. 3rd ed. New York: John Wiley, 1994.

MLA (9th ed.) Citation

Christian, Kaare. The UNIX Operating System. 3rd ed. John Wiley, 1994.