---. Usability Engineering. San Francisco: Morgan Kaufmann
       Publishers, 1993.

Nijs, Sven. "How to Use Navigation Icons on a Web Site."
      Web Review Online. March 6, 1998. June 1999
      <http://webreview.com/wr/pub/98/03/06/studio/ index.html>.

Norman, Donald A. The Design of Everyday Things. New York:
      Doubleday, 1998.

Parker, Roger C. Guide to Web Content and Design: Eight Steps to
      Web Site Success. New York: MIS:Press, 1997.

Rosenfeld, Louis, and Peter Morville. Information Architecture for the
      World Wide Web. Sebastopol: O'Reilly & Associates, 1998.

Sano, Darrell. Designing Large-Scale Web Sites: A Visual Design
      Methodology. New York, John Wiley & Sons, 1996.

Schriver, Karen A. Dynamics in Document Design: Creating Texts for
      Readers. New York: John Wiley & Sons, 1996.

Sinclair, Joseph T. Typography on the Web. San Diego: AP
      Professional, 1999.

Souttar, James. "Drag Me. Click me. Don't Try to Understand me."
      Eye Summer 1998: 58-63.

Spool, Jared M., et al. Web Site Usability: A Designer's Guide.
      San Francisco: Morgan Kaufmann, 1998.

Stansberry, Domenic. Labyrinths: The Art of Interactive Writing &
      Design:Content Develpoment for New Media. Belmont:
      Wadsworth, 1998.

Vitanza, Victor J. Writing for the World Wide Web. Upper Saddle
       River: Prentice Hall, 1997.

Tufte, Edward R. Envisioning Information. Cheshire: Graphic Press,
      1990.

---. The Visual Display of Quantitative Information. Cheshire: Graphic
      Press, 1983.

---. Visual Explanations: Images and Quantities, Evidence and       Narrative. Cheshire: Graphic Press, 1997.