APA (7th ed.) Citation

Barnard, R. L. (1988). Intrusion detection systems / Robert L. Barnard (2nd ed.). Butterworths.

Chicago Style (17th ed.) Citation

Barnard, Robert L. Intrusion Detection Systems / Robert L. Barnard. 2nd ed. Boston, (Mass.) ; London: Butterworths, 1988.

MLA (9th ed.) Citation

Barnard, Robert L. Intrusion Detection Systems / Robert L. Barnard. 2nd ed. Butterworths, 1988.

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