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<h2 id="see-also">See also</h2> <ul><li><a href="/facts/CSS_HTML_Validator/oEJM7AVo">CSS HTML Validator for Windows</a></li> <li><a href="/facts/HTML_Tidy/Dv1B4DCW">HTML Tidy</a></li> <li><a href="/facts/W3C_Markup_Validation_Service/dVLdyuoe">W3C Markup Validation Service</a></li> <li><a href="/facts/Well-formed_element/7Xrmp0fA">Well-formed element</a></li> <li><a href="/facts/XML_validation/MqgbRXzc">XML validation</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="/facts/W3C/lGWmhF6M">W3C</a>'s <a href="https://validator.w3.org/">HTML Validator</a></li> <li>W3C's <a href="http://jigsaw.w3.org/css-validator/">CSS Validator</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Lemay, Laura (1995). Teach Yourself More Web Publishing with HTML in a Week. Indianapolis, Ind: Sams.net Pub. p. 198. ISBN 9781575210056. <a href="9781575210056" target="_blank">9781575210056</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Tittel, Ed, and Mary C. Burmeister. HTML 4 for Dummies. --For dummies. Hoboken, NJ: Wiley Pub, 2005. <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>