Once you have located literature that is good an relevant, you are ready to read and learn from sources. This is a good point to think about how to organize your literature so it is easy for you to use and summarize. A good procedure is make copies of the articles or download the articles (as. html or .PDF files) and develop a system to easily retrieve the information. Copyright laws permit the duplication of only one complete article without the permission of the publisher. Organize the literature in a way that makes sense to you, such as by author, by topic (e.g., possession of weapons, prevention programs, and effects weapons), or by participant (e.g., middle school, high school, and college).