APA (7th ed.) Citation

Christian, K. (1988). The UNIX command reference guide. John Wiley & Sons.

Chicago Style (17th ed.) Citation

Christian, Kaare. The UNIX Command Reference Guide. New York: John Wiley & Sons, 1988.

MLA (9th ed.) Citation

Christian, Kaare. The UNIX Command Reference Guide. John Wiley & Sons, 1988.