APA (7th ed.) Citation

Walker, A. (2005). Absolute beginner's guide to security, spam, spyware & viruses. Que Pub.

Chicago Style (17th ed.) Citation

Walker, Andy. Absolute Beginner's Guide to Security, Spam, Spyware & Viruses. Indianapolis, Ind: Que Pub, 2005.

MLA (8th ed.) Citation

Walker, Andy. Absolute Beginner's Guide to Security, Spam, Spyware & Viruses. Que Pub, 2005.

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