So I went to a friends house to help her son with a science project for school. He is 12 and he did a pretty interesting project using toothpaste and agar.  He is using a project guide from 1974 and he was not taught how to reference a url in the bibliography. I just used MLA format and printed it out in case his teacher gave him any problems. He is a really smart kid and the New Orleans school system is not up to speed to keep up with him.