I'm working on a genealogy report where an ancestor's divorce made it all the way to the US Supreme court. I'd like to site the case in my report. The case is available online in several formats which include the background and the justice's opinion. Is it acceptable to cite the website or do I need to locate a law library and obtain a citation from a Supreme Court journal? The case citation is shorter than the examples for state supreme court cases noted in "Evidence Explained"--is there a format for citing US Supreme court cases? Am Am I over thinking this because a citation of the lower court's case which created the divorce decree would suffice?