Different rhetorical situations call for different approaches to citing sources—that is, for different ways of answering the question “Says who?” If you’re reading a popular magazine, you probably won’t expect the writer to provide careful source citations or a list of references at the end of an article. If you’re posting material on a blog, you might follow conventions for citation by simply linking to the material you’re talking about. But in other situations, including most academic writing, you will be expected to follow a more rigorous system for citing the information you use. Many courses in English ask writers to follow MLA style, the system developed by the Modern Language Association. For further reference, consult Chapters 50–52 or the MLA Handbook for Writers of Research Papers, Seventh Edition (2009).