A citation for a website will include a very different source element - the URL or Uniform Resource Locator. Website citations also usually include two dates: when you accessed the website and when the website was last updated (if known). Here is an example formatted in the MLA style:
Remember that the source element is important for the person who might be trying to locate your original resource. For a website citation, the dates also become important, as information on the internet can change often.
The example citations in this tutorial are each formatted according to a different style guide. Do not use them to format your citations. Consult the manual for the citation style your professor prefers instead.