Writing style, research and citations differ by discipline. There are three main disciplines: Humanities ( i.e. English, Religion, Philosophy, Art), Social Sciences (i.e. Political Science, Economics, Law, History), and the Sciences (i.e. Biology, Environmental Science, Math, Chemistry). In some cases you will find your research topics fall into more than one discipline. So when conducting research it's important to check with your teacher to determine the proper Writing, Structure and Evaluation and Citation Style.