Does wikipedia count as an encyclopedia article in the works cited page?

I'm doing my works cited page for my essay. I was just wondering if Wikipedia would go under encyclopedia article or web source.
Also: how do you cite a web source using MLA format?Please give me the form and an example :-)
Update: Okay loli sue i get it about wikipedia.

Now answer my other question: how do you cite a web source using MLA format NOT APA format.
Update 2: The information I've gotten from wikipedia and information i gotten from the book is almost exactly the same. My teacher is real cool about it so please don't tell me not to use it because i already did.
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