APA (7th ed.) Citation

Beale, J., Foster, J. C., & Posluns, J. (2003). Snort 2.0: Intrusion detection. Syngress.

Chicago Style (17th ed.) Citation

Beale, James, James C. Foster, and Jeffrey Posluns. Snort 2.0: Intrusion Detection. Rockland, Mass: Syngress, 2003.

MLA (9th ed.) Citation

Beale, James, et al. Snort 2.0: Intrusion Detection. Syngress, 2003.