The library has several online databases for students to use for this type of paper. The database Opposing Viewpoints In Context offers informed views that present each side of an issue (these could be articles from a variety of sources including academic journals, national newspapers and magazines).
The library's 'Writing and Citing' LibGuide (see that LibGuides 'essay' section) provides additional guidance for students in writing a persuasive paper.
See the short videos below for more information about researching for a persuasive essay.