Castro, E. (2007). HTML, XHTML & CSS: Visual quickstart guide (6th ed.). Peachpit Press.
Lua i Stíl Chicago (17ú heag.)Castro, Elizabeth. HTML, XHTML & CSS: Visual Quickstart Guide. 6th ed. Berkeley, CA: Peachpit Press, 2007.
Lua MLA (9ú heag.)Castro, Elizabeth. HTML, XHTML & CSS: Visual Quickstart Guide. 6th ed. Peachpit Press, 2007.
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