APA (7th ed.) Citation

Tiemann, B. A., & Urban, M. C. C. (2006). FreeBSD 6 unleashed (1st edition.). Sams.

Chicago Style (17th ed.) Citation

Tiemann, Brian Author, and Michael C Contributor Urban. FreeBSD 6 Unleashed. 1st edition. [Place of publication not identified]: Sams, 2006.

MLA (9th ed.) Citation

Tiemann, Brian Author, and Michael C Contributor Urban. FreeBSD 6 Unleashed. 1st edition. Sams, 2006.