W3.org - World Wide Web Consortium
W3.org - W3 CSS Validation
W3.org - W3 HTNL Validator
Lynda.com - Dreamweaver CS3 text, Garrick Chow.
Ablongman.com - Principals of Web Design, David Farkas.
Sensible.com - Don't Make Me Think, Steve Krug.
Cookwood.com - HTML, XHTML & CSS, Elizabeth Castro