10. External Sources

1. World Wide Web Consortium (W3C)
   1. W3C – Accessibility Initiative
   2. W3C – Resources
   3. W3C – XHTML
   4. W3C – Validation Tools
      1. HTML/XHTML Validator
      2. CSS Validator
      3. Mobile Validator
      4. RSS Validator
      5. Broken Link Checker
2. W3 Schools – Quality Accessibility
3. How Users Read the Web
4. Lynch and Horton – Web Style Guide
5. Internet Engineering Task Force