If your article is web-based, you should create a direct link to this paper directly from within the text. The use of a "References" section applies to paper media, whereas a direct hyperlink is appropriate for Web documents. Just include the following HTML:
<a href="http://www.cis.ufl.edu/~fishwick/cpudisk/" >Citation</a>
If your article is not web-based then the following citation is recommended:
Fishwick, Paul A., Belk, Matthew, R. and Spatz, Bradley, C., "An Interactive Web Simulation of CPU/Disk Performance", URL: http://www.cis.ufl.edu/~fishwick/cpudisk/, September, 1995.