Dyfyniad APA

ebrary, Inc. (2005). Website usability: Research and case studies. Emerald Group Publishing.

Dyfyniad Arddull Chicago

ebrary, Inc. Website Usability: Research and Case Studies. Bradford, England: Emerald Group Publishing, 2005.

Dyfyniad MLA

ebrary, Inc. Website Usability: Research and Case Studies. Emerald Group Publishing, 2005.

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