Cita APA

 Shelly, G. B. (2010).  HTML, XHTML, and CSS: Comprehensive.  Course Technology.

Chicago Style Citation

 Shelly, Gary B.  HTML, XHTML, and CSS: Comprehensive.  Course Technology, 2010.

Cita MLA

 Shelly, Gary B.  HTML, XHTML, and CSS: Comprehensive.  Course Technology, 2010.

Atenció: Aquestes cites poden no estar 100% correctes.