I would try to find a Site with an ending of .edu. i would also try to search questions like why, where, who, and when. you would have to write the rest down i am sorry but i cannot think of anything else. Sorry!
To use sites as a reference for a research paper, you want to make sure they are reliable. You can look and see who can edit the website. Another way that you can also find out if it is a reliable source is too see if they have cited anything from other websites.