APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

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