From top 10 TPT seller, PowerPoint Guru. Knowing when and how to use outside, secondary sources in a paper is a difficult skill and one that is difficult for students to master. This PowerPoint closes analyzes how and when to use quotations in a paper that ADD to the paper and FLOW within the paper. In this PPT I have broken quotation usage into 4 different levels from basic to advanced. Add this PPT with my other MLA PowerPoints!