APA (7th ed.) Citation

Matzan, J. (2007). The OpenBSD 4.0 crash course (1st edition.). O'Reilly Media.

Chicago Style (17th ed.) Citation

Matzan, Jem. The OpenBSD 4.0 Crash Course. 1st edition. [Sebastopol, California]: O'Reilly Media, 2007.

MLA (9th ed.) Citation

Matzan, Jem. The OpenBSD 4.0 Crash Course. 1st edition. O'Reilly Media, 2007.

Warning: These citations may not always be 100% accurate.