Sklar, J. (2012). Web design principles (5th ed., International ed.). Course Technology, Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Sklar, Joel. Web Design Principles. 5th ed., International ed. Australia: Course Technology, Cengage Learning, 2012.
Lua MLA (9ú heag.)Sklar, Joel. Web Design Principles. 5th ed., International ed. Course Technology, Cengage Learning, 2012.
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