APA (7th ed.) Citation

Ward, B. (2004). How Linux works: What every super-user should know. No Starch Press.

Chicago Style (17th ed.) Citation

Ward, Brian. How Linux Works: What Every Super-user Should Know. San Francisco: No Starch Press, 2004.

MLA (9th ed.) Citation

Ward, Brian. How Linux Works: What Every Super-user Should Know. No Starch Press, 2004.