World Wide Web Consortium
- XHTML1.1 W3C Recommendation : http://www.w3.org/TR/xhtml1/
- XHTML1.0 W3C Working Draft : http://www.w3.org/TR/xhtml11/
- XHTML2.0 W3C Working Draft : http://www.w3.org/TR/xhtml2/
- XHTML1.0 Document Type Definitions : http://www.w3.org/TR/xhtml1/dtds.html
- HTML 4.01 Specification : http://www.w3.org/TR/html401/
- XHTML 1.0 : http://trio.co.kr/webrefer/xhtml/xhtmlidx.html
- HTML 4.01 : http://trio.co.kr/webrefer/xhtml/xhtmlidx.html
- w3schools XHTML Tutorial : http://www.w3schools.com/xhtml/
- cadvance(w3schools 번역) : http://www.cadvance.org/doc/xhtml
- http://www.sir.co.kr/bbs/board.php?bo_table=pl_css
