How can I use BibTeX to cite a web page?

A simple way of doing it in BibTeX is with a @misc entry:

@misc{WinNT,
  title = {{MS Windows NT} Kernel Description},
  howpublished = {\url{http://web.archive.org/web/20080207010024/http://www.808multimedia.com/winnt/kernel.htm}},
  note = {Accessed: 2010-09-30}
}

You should also perhaps include an author if you know it. And remember to load a package such as hyperref or url.

---

If you are using BibLaTeX there is an @online entry type:

@online{WinNT,
  author = {MultiMedia LLC},
  title = {{MS Windows NT} Kernel Description},
  year = 1999,
  url = {http://web.archive.org/web/20080207010024/http://www.808multimedia.com/winnt/kernel.htm},
  urldate = {2010-09-30}
}

I always use the defaults suggested by Wikipedia (see "BibTeX entry" at the bottom), available if you click on "cite this page".

The JabRef reference manager suggests to use the "electronic" type. So I do it like this:

@electronic{Rub1,
 author = {Rubino, Daniel},
 editor = {{Windows Phone Central}},
 title = {IE9 for Windows Phone 7: Adobe Flash, demos and development},
 url = {http://www.wpcentral.com/ie9-windows-phone-7-adobe-flash-demos-and-development-videos},
 urldate = {14.01.2013},
 originalyear = {18.02.2011}
}

In the BibTeX export of Citavi there is als the type "www". Depending on your editor you have to define the styles "electronic" and "www", so "misc" seems to be probably the safest.

But then you should use \bibliographystyle{alphadin} and do it like this:

@misc{Rub1,
 author = {Rubino, Daniel},
 editor = {{Windows Phone Central}},
 title = {IE9 for Windows Phone 7: Adobe Flash, demos and development},
 url = {http://www.wpcentral.com/ie9-windows-phone-7-adobe-flash-demos-and-development-videos},
 lastchecked = {14.01.2013},
 originalyear = {18.02.2011}
}