Baker, A R., Caswell, B., & Poor, M. (2004). Snort 2.1 intrusion detection(2nd ed.). Rockland, Mass.: Syngress.

Snort 2.1 intrusion detection / featuring the Snort development team Andrew R. Baker, Brian Caswell, Mike Poor ; foreward by Stephen Northcutt with Raven Adler ... [et al.] . — 2nd ed.. — Rockland, Mass. : Syngress, 2004. — xxx, 716 p.; ill; 24 cm. — ISBN 1931836043 (pbk.) :

Baker, Andrew R., Brian Caswell, and Mike Poor. Snort 2.1 Intrusion Detection.2nd ed.Rockland, Mass.: Syngress, 2004.