APA (7th ed.) Citation

Castro, E. A. (2006). HTML, XHTML, and CSS (6th ed.). Peachpit Press.

Chicago Style (17th ed.) Citation

Castro, Elizabeth Author. HTML, XHTML, and CSS. 6th ed. [Place of publication not identified]: Peachpit Press, 2006.

MLA (9th ed.) Citation

Castro, Elizabeth Author. HTML, XHTML, and CSS. 6th ed. Peachpit Press, 2006.