how do i site something using MLA
The complete answer will depend on the type of item you are citing (book, article, website, etc.). Here are a couple of links to online citation guides fro MLA that might help:
I kind of like the second one because it has a drop down menu you can use to choose the type of this you need to cite and get an example. It doesn't give as much explantion though.
I hope these can get you headed in the right direction. Please ask a follow-up or stop by the library if you need additional infromation to get your citations completed.