Sorry. I can't help you there. I suggest using Google, Bing or some other search engine.
Good luck on your English assignment.
The easiest thing to do is use Google - but in a pinch, you can even go to the Wikipedia page about the war in Iraq (or anything, really), look down at the bottom for the references used in article and use those references in your assignment.
Used to be you'd have to look up newspaper clippings or go to a library - now you don't even need to leave your house! Good luck!