Sources

http://www.siliconvalleyccie.com/apachebasic.htm
http://www.securityfocus.com/infocus/1786 (Securing Apache 2: Step-by-Step)
http://www.securityfocus.com/infocus/1694 (Securing Apache: Step-by-Step)
http://www.linux.com/article.pl?sid=04/07/09/1935231 (Securing Apache)